What should you eat after a 24-hour fast?

Something warm and liquid first, then a small soft course twenty to thirty minutes later, then a normal meal at about two thirds the usual size. A mug of broth or a thin soup, sipped rather than drunk, then eggs or cooked vegetables or a small piece of fish, then dinner. The reason is comfort rather than danger: after a day the gut has been running its between-meals housekeeping pattern instead of digesting, and the big meal people have been imagining since hour eighteen tends to land as bloating and a slump. Nobody has run a trial on this, and this page says so rather than dressing up practice as science.

How do you break a 48-hour or 72-hour fast?

The same sequence, slower, spread across the day instead of the hour. Twenty minutes on a salted broth, a small soft course after half an hour to an hour, a half-sized meal two to three hours later, then two or three more small meals through the rest of the day — and back to eating normally the following day rather than the same evening. Salt matters more here than the food does: sodium is what a two-day fast loses most of, and it is the commonest reason people feel wretched in the hours after one. Go back to hard training the day after, not the same day.

How much should you eat when you break a fast?

Less than you want to, and the number nobody can give you honestly is how much less. The rules of thumb on this page — two thirds of a normal meal after a day, about half after two — are rules of thumb and are labelled as such, because no study has measured the right first-meal size after any length of fast. What is reliable is the direction of the error: people overshoot, never undershoot. Hunger after a long fast is bigger than the appetite that preceded it and it does not switch off when you have had enough, so the useful instruction is to stop while you could still eat more.

Why not just eat a big meal after a fast?

Because it reliably feels awful, and because the day is a better unit than the meal past about 36 hours. A large first meal after a long fast is the commonest reported cause of the bloating, cramping and energy crash people blame on fasting itself. Fat slows the stomach further when it is already slow, raw fibre is the hardest thing a quiet gut can be handed, and sugar first is the version people feel worst after at every length including an overnight fast. None of that is dangerous in a healthy adult. It is simply an avoidable bad evening, and avoiding it costs twenty minutes.

What is refeeding syndrome, and should I worry about it?

It is a collapse in blood chemistry when someone who has been starved for a long time starts eating again — insulin returns, drives phosphate, potassium and magnesium into cells from a baseline that only looked normal, and the tissues spending the most energy fail first. It is real and it kills people. It also belongs to a specific group. The checklist clinicians use has one criterion about time without food, and the shortest version of it is more than five days, in the tier that needs two criteria met. A well-nourished adult at a normal weight who was eating normally up to the hour the fast started scores nothing at 48 or 72 hours. The published cases after a voluntary fast are 40 and 51 days long. What this page will not tell you is that the risk is zero, because nobody has studied the criteria in healthy people who chose to fast — only that the criteria say you are not in the group.

When does breaking a fast need medical supervision?

At five days and beyond, and at any length if the risk criteria describe you — a BMI under 18.5, unintentional weight loss over 10% in three to six months, a history of alcohol abuse, or medication including insulin, chemotherapy, antacids or diuretics. The British guideline is explicit that anyone who has eaten little or nothing for more than five days should restart at no more than half of their requirements for the first two days, whatever else is true of them. Where the full high-risk criteria apply the management is bloods before food, feeding restarted at a maximum of 10 kcal per kilogram a day, thiamine before and through the first ten days, and phosphate, potassium and magnesium replaced on a schedule. That is a treatment plan, and this page will not pretend it can hand you one.

Does the order you eat things in actually matter?

There is real human evidence that it does, and it was not measured in anyone breaking a fast. Eating protein and vegetables before the carbohydrate at the same meal lowers the glucose rise from that meal, and the clearest trials of it were run in people with type 2 diabetes. Whether it makes any measurable difference to a healthy adult opening a 16-hour window is not established. It is on this page because it costs nothing to do and because it is one of the few things here with a study behind it — labelled as probable rather than established, and with the population it was measured in named.

Can you break a fast on a vegan or vegetarian plan?

Yes, and the filter on this page removes items rather than substituting them. Choosing vegan drops the eggs, the fish, the yoghurt and the bone broth from the lists and names what it dropped, instead of quietly rewording each one into a plant version and hoping you do not notice. Vegetable broth, miso, silken tofu, cooked vegetables and a soft banana do the same job as a first course. The one thing worth watching on a plant plan is that pulses carry a lot of fibre, which is the thing a quiet gut handles worst, so lentils and beans belong in the meal rather than in the first few mouthfuls.

The first meal

How to break a fast

How you break a fast matters more the longer it was, and almost not at all when it was short. Under sixteen hours, eat your normal meal. Past a day, start with something warm and liquid, wait, and make the first meal smaller than you want it. Past five days, break it with medical supervision.

Pick the length you actually fasted. Every plan below is on this page already — the picker moves one of them to the top rather than fetching anything.

Dietary restrictions

These remove items from the lists. They do not substitute anything, and the page names what it took away — a plan that quietly swaps the eggs for tofu has stopped telling you what it is doing.

Vegetarian Vegan Dairy-free Gluten-free

Your plan

5 days or longer

Established

Five days and beyond.

Break this one with medical supervision. This page will not give you a meal plan for it.

Five days is where the guidance clinicians work from names the length itself as a risk factor, and where the danger stops being an uncomfortable evening and becomes blood chemistry. Refeeding syndrome is treated by checking bloods before food, restarting at a fraction of normal intake, giving thiamine, and replacing phosphate, potassium and magnesium on a schedule. None of that is something a website can hand you, and a first-meal list on this page would be a way of pretending otherwise.

Break a fast of this length with medical supervision. There is no meal plan on this page for five days or more, and there is not going to be one. At this length the guideline stops being about what to eat and starts being about how much energy per kilogram of body weight, measured bloods before the first mouthful, and thiamine given before feeding rather than after.

Talk to a clinician before you fast, not before you eat again. If you are already at the end of one, that conversation is today's job rather than tomorrow's.

The criteria, the rule about length alone, and what supervision actually involves are set out in full below.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know
A large raw salad, or raw cruciferous vegetables Raw fibre is the hardest thing there is for a gut that has spent a day doing nothing. Bloating and cramps, reliably. Cook them and they are fine.
Deep-fried or heavily processed food Hard work to digest at the best of times, and this is not the best of times.
A large portion of nuts or seeds Dense, fatty and full of fibre. A handful in a meal is fine; a bowl of them as the first food is not.
A big glass of milk or a large serving of unfermented dairy Lactose tolerance is a spectrum, and a large dose of it as the first food after a day is how people who did not know they were at the sensitive end find out.
A large, fatty meal Fat slows the stomach down. That is useful when you are eating normally and unhelpful when the stomach is already slow.
Making up the missed calories in one sitting The day is the unit past 36 hours, not the meal. Spreading the food out is the single most useful thing on this list.
Going straight back to your normal training Give it a day. Hard training on the first day back stacks a second demand on top of the one your body is already dealing with. Working Out While Fasting: The Complete Guide
Caffeine on top of the first meal Coffee lifts colon motor activity within minutes, which is not what a gut coming back from three days needs on top of food.

How well this is known: Refeeding syndrome and its management are guideline material. That is the strongest evidence on this page, and it is the one band where the answer is not a meal. Print this plan

How to break a fast, by how long you fasted

Eight lengths, eight plans. Each step carries how well it is known, in the same three words the fasting checker uses, and most of them read common practice, not trial-tested — because that is what the evidence supports and pretending otherwise would be the easy thing to do.

12 to 16 hours

Established

An overnight fast, 12:12 or 14:10.

Eat your normal meal. There is nothing to be careful about.

Twelve to sixteen hours is the gap between dinner and a late breakfast, and the human body has done it every night for as long as there have been humans. Your stomach is not empty in any sense that matters, your digestive enzymes have not gone anywhere, and no clinic anywhere treats a fourteen-hour gap as something to be reintroduced to food. Eat the meal you were going to eat.

Straight away

A normal meal Established

No sequence, no waiting, no first-food rule. If you want one thing out of this band, make it protein, because protein is the macronutrient most people breaking a 16:8 fast fall short on across the day.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Cheese, oatcakes and a salada normal plate
  A cold plate for the days you are not cooking. Save it for the shorter bands; it is a lot of fat and a lot of raw leaves at once.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.

How well this is known: This is the one band where the honest answer is that nothing special is required, and it is honest because an overnight fast is the baseline condition every nutrition study measures people in. Print this plan

16 to 20 hours

Probable

The 16:8 and 18:6 windows.

A normal meal, with the protein and vegetables ahead of the bread and rice.

Sixteen hours is where most people who say they fast actually are, and it is still an ordinary meal. The only change worth making is the order things arrive in: put the protein and the vegetables in first and the starch last. That is not a fasting rule — it is a glucose finding, it was measured at ordinary meals rather than after a fast, and the trials were mostly run in people with type 2 diabetes. It costs nothing to do, which is why it is here.

First

Protein and vegetables Probable

Eating the protein and vegetables before the carbohydrate lowers the glucose rise from the same plate. The big effects were measured in people with type 2 diabetes on metformin, where the area under the glucose curve fell by more than half; the healthy-adult evidence points the same way and is much smaller — six studies and about a hundred people between them. None of it was measured in anybody breaking a deliberate fast.
- Soft-scrambled or boiled eggsone or two
  Protein with almost no volume and nothing hard to break down. The most reliable first solid there is.
- Plain yoghurt or kefira small pot
  Soft, cool, and easy. Choose the unsweetened kind — a sweetened pot is a dessert with a health claim on it.
- Avocadohalf
  Fat and potassium in a form that needs no work at all. Half is a portion; a whole one is a meal.
- Steamed or cooked vegetablesa small bowl
  Cooking breaks down the plant cell walls that raw vegetables make your gut do itself. That is the whole reason cooked beats raw here.
- Steamed white fisha palm-sized piece
  Light protein, no fibre, nothing fried. Leave the sauce until later.
- Mashed or baked sweet potatoa small portion
  Soft carbohydrate that does not need chewing. Good where a strict low-carbohydrate first meal is not the goal.
- Silken tofua small portion
  Plant protein in the softest form it comes in.
- Cooked lentils or split peasa few spoonfuls
  Plant protein, well cooked. A few spoonfuls only — pulses carry a lot of fibre, which is the thing a quiet gut handles worst.
- Bananaone
  Soft, quick and carries potassium. Fruit is fine here; it is only a problem when it is the whole meal.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
Then

The rest of the plate Established

Bread, rice, potato, fruit — all fine, and none of them needs to be avoided. They go last rather than first.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Cheese, oatcakes and a salada normal plate
  A cold plate for the days you are not cooking. Save it for the shorter bands; it is a lot of fat and a lot of raw leaves at once.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.

How well this is known: Meal order has real human data behind it. What it does not have is a study in people breaking a fast, so treat the size of the effect as unknown for you. Print this plan

20 to 24 hours

Common practice, not trial-tested

A 20:4 window, or one meal a day.

Start with something small, wait, then eat the meal.

Around the twenty-hour mark people start reporting that a big first meal sits badly — heavy, bloated, sleepy. That is a comfort problem rather than a safety one, and it has a cheap fix: eat something small, wait fifteen or twenty minutes, and then eat properly. Nobody has run a trial on this. It is what experienced one-meal-a-day eaters do, and it costs you a quarter of an hour.

Minute 0

Something small Common practice, not trial-tested

A small portion — a couple of eggs, a bowl of soup, some yoghurt. Enough to start eating, not enough to be the meal.
- Soft-scrambled or boiled eggsone or two
  Protein with almost no volume and nothing hard to break down. The most reliable first solid there is.
- Plain yoghurt or kefira small pot
  Soft, cool, and easy. Choose the unsweetened kind — a sweetened pot is a dessert with a health claim on it.
- Avocadohalf
  Fat and potassium in a form that needs no work at all. Half is a portion; a whole one is a meal.
- Steamed or cooked vegetablesa small bowl
  Cooking breaks down the plant cell walls that raw vegetables make your gut do itself. That is the whole reason cooked beats raw here.
- Steamed white fisha palm-sized piece
  Light protein, no fibre, nothing fried. Leave the sauce until later.
- Mashed or baked sweet potatoa small portion
  Soft carbohydrate that does not need chewing. Good where a strict low-carbohydrate first meal is not the goal.
- Silken tofua small portion
  Plant protein in the softest form it comes in.
- Cooked lentils or split peasa few spoonfuls
  Plant protein, well cooked. A few spoonfuls only — pulses carry a lot of fibre, which is the thing a quiet gut handles worst.
- Bananaone
  Soft, quick and carries potassium. Fruit is fine here; it is only a problem when it is the whole meal.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After 15 to 20 minutes

The full meal Common practice, not trial-tested

Protein and vegetables first, then the starch, for the same reason as the shorter bands. Eat until you have had enough rather than until the plate is empty; hunger after a fast overshoots what you need.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Cheese, oatcakes and a salada normal plate
  A cold plate for the days you are not cooking. Save it for the shorter bands; it is a lot of fat and a lot of raw leaves at once.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know

How well this is known: No trial has compared a small first bite against going straight to the meal. This band is practice, and it is labelled as practice. Print this plan

24 to 36 hours

Common practice, not trial-tested

A full day without food.

Something liquid and warm first. Wait half an hour. Then a modest meal.

A full day is the first length where the sequence is worth planning rather than improvising. The gut has been running its between-meals housekeeping pattern rather than digesting, and the first big meal after a day off tends to land as bloating and a slump rather than as dinner. None of that is dangerous, and the fix is a warm liquid, a wait, and a meal that is smaller than the one you have been imagining since hour eighteen.

Minute 0

Something warm and liquid Common practice, not trial-tested

Sip it rather than drink it. And be clear about what the liquid is doing: what governs how fast the stomach empties is the calories delivered, not whether they arrive as a drink. A 500-calorie smoothie is not gentle because you drank it. The reason to start with a mug of broth is that a mug of broth is small.
- Bone brothone mug, sipped over 20 minutes
  Warm, salty, and almost nothing to digest. It is food — it carries protein, and it ends a fast on every definition — which is exactly what you want at this point. Does Bone Broth Break a Fast?
- Vegetable brothone mug, sipped over 20 minutes
  The same job without the animal protein, and easier to salt to taste.
- Miso soupone small bowl
  Warm, salty and thin. Check the label if you avoid gluten — most miso is made with barley or wheat.
- Water with a pinch of saltone glass
  The cheapest version of the same idea. Sodium is the electrolyte a long fast loses most of, and it is the one that makes people feel awful when it runs low. Electrolytes During Fasting: Do You Need Them?
- Thin vegetable soupone small bowl
  Blended and strained rather than chunky. The less there is to chew, the less there is to go wrong.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After 20 to 30 minutes

A small, soft first course Common practice, not trial-tested

Soft, cooked and modest. This is the course people skip, and skipping it is why the meal after a 24-hour fast so often ends in an hour on the sofa. Gastric emptying does measurably slow after a day without food, which is the physiology this step is built on — though the study that measured it had fourteen people in it and two of them went the other way.
- Soft-scrambled or boiled eggsone or two
  Protein with almost no volume and nothing hard to break down. The most reliable first solid there is.
- Plain yoghurt or kefira small pot
  Soft, cool, and easy. Choose the unsweetened kind — a sweetened pot is a dessert with a health claim on it.
- Avocadohalf
  Fat and potassium in a form that needs no work at all. Half is a portion; a whole one is a meal.
- Steamed or cooked vegetablesa small bowl
  Cooking breaks down the plant cell walls that raw vegetables make your gut do itself. That is the whole reason cooked beats raw here.
- Steamed white fisha palm-sized piece
  Light protein, no fibre, nothing fried. Leave the sauce until later.
- Mashed or baked sweet potatoa small portion
  Soft carbohydrate that does not need chewing. Good where a strict low-carbohydrate first meal is not the goal.
- Silken tofua small portion
  Plant protein in the softest form it comes in.
- Bananaone
  Soft, quick and carries potassium. Fruit is fine here; it is only a problem when it is the whole meal.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After a further 30 minutes

A normal meal, at about two thirds the usual size Common practice, not trial-tested

Two thirds is a rule of thumb and nothing more — nobody has measured the right first-meal size after a day of fasting. It is here because the failure mode people report is always too much, never too little.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Cheese, oatcakes and a salada normal plate
  A cold plate for the days you are not cooking. Save it for the shorter bands; it is a lot of fat and a lot of raw leaves at once.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know
A large raw salad, or raw cruciferous vegetables Raw fibre is the hardest thing there is for a gut that has spent a day doing nothing. Bloating and cramps, reliably. Cook them and they are fine.
Deep-fried or heavily processed food Hard work to digest at the best of times, and this is not the best of times.
A large portion of nuts or seeds Dense, fatty and full of fibre. A handful in a meal is fine; a bowl of them as the first food is not.
A big glass of milk or a large serving of unfermented dairy Lactose tolerance is a spectrum, and a large dose of it as the first food after a day is how people who did not know they were at the sensitive end find out.

How well this is known: The quiet gut is real physiology; that a liquid first course helps with it is practice, not a measured result. Print this plan

36 to 48 hours

Common practice, not trial-tested

A day and a half to two days.

The same sequence, slower, and spread the day rather than the hour.

Past a day and a half the useful unit stops being the meal and becomes the day. Break the fast with something liquid, add a small soft course, then eat a modest meal — and then leave the second normal-sized meal until several hours later rather than eating twice in an evening to make up for the day you missed. The appetite that arrives after 36 hours is bigger than the appetite you had before it, and it is not information.

Minute 0

Something warm and liquid Common practice, not trial-tested

Add salt to it. Sodium losses over a day and a half of fasting are the commonest reason people feel awful in the hours after a long fast, and a salted broth or soup fixes two things at once.
- Bone brothone mug, sipped over 20 minutes
  Warm, salty, and almost nothing to digest. It is food — it carries protein, and it ends a fast on every definition — which is exactly what you want at this point. Does Bone Broth Break a Fast?
- Vegetable brothone mug, sipped over 20 minutes
  The same job without the animal protein, and easier to salt to taste.
- Miso soupone small bowl
  Warm, salty and thin. Check the label if you avoid gluten — most miso is made with barley or wheat.
- Water with a pinch of saltone glass
  The cheapest version of the same idea. Sodium is the electrolyte a long fast loses most of, and it is the one that makes people feel awful when it runs low. Electrolytes During Fasting: Do You Need Them?
- Thin vegetable soupone small bowl
  Blended and strained rather than chunky. The less there is to chew, the less there is to go wrong.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After 30 minutes

A small, soft first course Common practice, not trial-tested

Keep it to a few mouthfuls more than feels sufficient. Cooked rather than raw, soft rather than fibrous.
- Soft-scrambled or boiled eggsone or two
  Protein with almost no volume and nothing hard to break down. The most reliable first solid there is.
- Plain yoghurt or kefira small pot
  Soft, cool, and easy. Choose the unsweetened kind — a sweetened pot is a dessert with a health claim on it.
- Avocadohalf
  Fat and potassium in a form that needs no work at all. Half is a portion; a whole one is a meal.
- Steamed or cooked vegetablesa small bowl
  Cooking breaks down the plant cell walls that raw vegetables make your gut do itself. That is the whole reason cooked beats raw here.
- Steamed white fisha palm-sized piece
  Light protein, no fibre, nothing fried. Leave the sauce until later.
- Mashed or baked sweet potatoa small portion
  Soft carbohydrate that does not need chewing. Good where a strict low-carbohydrate first meal is not the goal.
- Silken tofua small portion
  Plant protein in the softest form it comes in.
- Bananaone
  Soft, quick and carries potassium. Fruit is fine here; it is only a problem when it is the whole meal.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After 1 to 2 hours

A modest meal Common practice, not trial-tested

About half of what you would normally eat, with protein in it. The rest of the day is where the food you missed goes.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
Later the same day

A second normal meal Common practice, not trial-tested

Several hours after the first, not straight after it. Anything from the list above, at an ordinary size. The gap is the instruction, not the menu.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know
A large raw salad, or raw cruciferous vegetables Raw fibre is the hardest thing there is for a gut that has spent a day doing nothing. Bloating and cramps, reliably. Cook them and they are fine.
Deep-fried or heavily processed food Hard work to digest at the best of times, and this is not the best of times.
A large portion of nuts or seeds Dense, fatty and full of fibre. A handful in a meal is fine; a bowl of them as the first food is not.
A big glass of milk or a large serving of unfermented dairy Lactose tolerance is a spectrum, and a large dose of it as the first food after a day is how people who did not know they were at the sensitive end find out.
A large, fatty meal Fat slows the stomach down. That is useful when you are eating normally and unhelpful when the stomach is already slow.
Making up the missed calories in one sitting The day is the unit past 36 hours, not the meal. Spreading the food out is the single most useful thing on this list.

How well this is known: Practice again. What is established here is only the direction of travel: the longer the fast, the more carefully clinics reintroduce food. Print this plan

48 to 72 hours

Common practice, not trial-tested

Two to three days.

A slow first hour, small meals across the rest of the day, and a full day back to normal.

Two to three days is the longest fast most people ever do and the point where the advice hardens from comfort into caution. It is worth being precise about why. A well-nourished adult who was eating normally up to the moment the fast started does not meet the criteria clinicians use to flag refeeding risk — those criteria are about the state you were already in, not the length of one weekend. What does happen at this length is that a large first meal reliably feels terrible, and that the electrolytes you have been losing for two days need to come back with the food.

Minute 0

A salted broth or soup, sipped Common practice, not trial-tested

Twenty minutes on one mug. This is the step that gets rushed, and rushing it is the whole problem.
- Bone brothone mug, sipped over 20 minutes
  Warm, salty, and almost nothing to digest. It is food — it carries protein, and it ends a fast on every definition — which is exactly what you want at this point. Does Bone Broth Break a Fast?
- Vegetable brothone mug, sipped over 20 minutes
  The same job without the animal protein, and easier to salt to taste.
- Miso soupone small bowl
  Warm, salty and thin. Check the label if you avoid gluten — most miso is made with barley or wheat.
- Water with a pinch of saltone glass
  The cheapest version of the same idea. Sodium is the electrolyte a long fast loses most of, and it is the one that makes people feel awful when it runs low. Electrolytes During Fasting: Do You Need Them?
- Thin vegetable soupone small bowl
  Blended and strained rather than chunky. The less there is to chew, the less there is to go wrong.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After 30 to 60 minutes

A small, soft course Common practice, not trial-tested

A few hundred calories at most: soft protein and something cooked. Not a plate.
- Soft-scrambled or boiled eggsone or two
  Protein with almost no volume and nothing hard to break down. The most reliable first solid there is.
- Plain yoghurt or kefira small pot
  Soft, cool, and easy. Choose the unsweetened kind — a sweetened pot is a dessert with a health claim on it.
- Avocadohalf
  Fat and potassium in a form that needs no work at all. Half is a portion; a whole one is a meal.
- Steamed or cooked vegetablesa small bowl
  Cooking breaks down the plant cell walls that raw vegetables make your gut do itself. That is the whole reason cooked beats raw here.
- Steamed white fisha palm-sized piece
  Light protein, no fibre, nothing fried. Leave the sauce until later.
- Mashed or baked sweet potatoa small portion
  Soft carbohydrate that does not need chewing. Good where a strict low-carbohydrate first meal is not the goal.
- Silken tofua small portion
  Plant protein in the softest form it comes in.
- Bananaone
  Soft, quick and carries potassium. Fruit is fine here; it is only a problem when it is the whole meal.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
After 2 to 3 hours

A small meal Common practice, not trial-tested

Half-sized, and stop while you could still eat more. Include salt.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
The rest of the day

Two or three more small meals Common practice, not trial-tested

Anything from the list above, in small servings a few hours apart. Small and spread out beats one large meal every time, and the following day is when you go back to eating normally — not the same evening.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know
A large raw salad, or raw cruciferous vegetables Raw fibre is the hardest thing there is for a gut that has spent a day doing nothing. Bloating and cramps, reliably. Cook them and they are fine.
Deep-fried or heavily processed food Hard work to digest at the best of times, and this is not the best of times.
A large portion of nuts or seeds Dense, fatty and full of fibre. A handful in a meal is fine; a bowl of them as the first food is not.
A big glass of milk or a large serving of unfermented dairy Lactose tolerance is a spectrum, and a large dose of it as the first food after a day is how people who did not know they were at the sensitive end find out.
A large, fatty meal Fat slows the stomach down. That is useful when you are eating normally and unhelpful when the stomach is already slow.
Making up the missed calories in one sitting The day is the unit past 36 hours, not the meal. Spreading the food out is the single most useful thing on this list.
Going straight back to your normal training Give it a day. Hard training on the first day back stacks a second demand on top of the one your body is already dealing with. Working Out While Fasting: The Complete Guide
Caffeine on top of the first meal Coffee lifts colon motor activity within minutes, which is not what a gut coming back from three days needs on top of food.

How well this is known: The meal sequence is practice. The refeeding criteria below it are guideline-grade, and they are two different kinds of claim on the same page. Print this plan

72 hours to 5 days

Probable

Three to five days.

Take a full day to come back, not a meal. Read the risk criteria before you start, not after.

Past three days the only documented way of doing this comes from therapeutic fasting clinics, and they do not break a fast with a meal. They break it over days: a small amount of fruit, then a few hundred calories, then a thousand, building back up while somebody watches. That is the shape to copy. This is also the band where the risk criteria stop being an appendix — a fast approaching five days is one component of the checklist clinicians use, and a single further factor puts a person in the high-risk group.

Day 1, minute 0

A piece of fruit, eaten slowly Common practice, not trial-tested

The fasting clinic whose protocol this shape comes from breaks its fasts with an apple at lunch, and calls that a tradition rather than a finding — it appears on the clinic's own pages and nowhere in the paper. Small, watery, and something that takes ten minutes to chew.
- Bone brothone mug, sipped over 20 minutes
  Warm, salty, and almost nothing to digest. It is food — it carries protein, and it ends a fast on every definition — which is exactly what you want at this point. Does Bone Broth Break a Fast?
- Vegetable brothone mug, sipped over 20 minutes
  The same job without the animal protein, and easier to salt to taste.
- Miso soupone small bowl
  Warm, salty and thin. Check the label if you avoid gluten — most miso is made with barley or wheat.
- Water with a pinch of saltone glass
  The cheapest version of the same idea. Sodium is the electrolyte a long fast loses most of, and it is the one that makes people feel awful when it runs low. Electrolytes During Fasting: Do You Need Them?
- A ripe apple or pearone piece, eaten slowly
  What the therapeutic-fasting clinics break a long fast with. Watery, mild, and slow to eat.
- Thin vegetable soupone small bowl
  Blended and strained rather than chunky. The less there is to chew, the less there is to go wrong.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
Day 1, a few hours in

A light soup, and nothing else Probable

The whole of day one is a few hundred calories of soft, low-fat, mostly plant food, split into small servings. It is a day, not a course.
- Soft-scrambled or boiled eggsone or two
  Protein with almost no volume and nothing hard to break down. The most reliable first solid there is.
- Plain yoghurt or kefira small pot
  Soft, cool, and easy. Choose the unsweetened kind — a sweetened pot is a dessert with a health claim on it.
- Avocadohalf
  Fat and potassium in a form that needs no work at all. Half is a portion; a whole one is a meal.
- Steamed or cooked vegetablesa small bowl
  Cooking breaks down the plant cell walls that raw vegetables make your gut do itself. That is the whole reason cooked beats raw here.
- Steamed white fisha palm-sized piece
  Light protein, no fibre, nothing fried. Leave the sauce until later.
- Mashed or baked sweet potatoa small portion
  Soft carbohydrate that does not need chewing. Good where a strict low-carbohydrate first meal is not the goal.
- Silken tofua small portion
  Plant protein in the softest form it comes in.
- Bananaone
  Soft, quick and carries potassium. Fruit is fine here; it is only a problem when it is the whole meal.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
Day 2

Small meals, still light Probable

Roughly half of what you normally eat, in three or four small meals, still soft and still low in fat. The published protocol ramps from about 800 to about 1,600 kcal a day across four days.
- Chicken or turkey with cooked vegetablesa normal plate
  Plain protein and something cooked alongside it. The default, and there is nothing wrong with the default.
- Oily fish with vegetablesa normal plate
  Salmon, mackerel or sardines. Protein and fat, and easier to eat slowly than red meat.
- Eggs with vegetables and toasta normal plate
  The breakfast most people are breaking a 16-hour fast with anyway. It is a good meal.
- Lentil or bean stewa normal bowl
  Plant protein with the fibre cooked soft. Best once you are past the first course rather than as it.
- Tofu or tempeh with rice and vegetablesa normal plate
  Protein, starch and something green. Rice is one of the gentler starches on a gut that has been quiet.
- Greek yoghurt with fruit and nutsa normal bowl
  Protein-forward and quick. Keep the nuts to a handful — they are dense and easy to overdo.
- Rice or potato with your proteina normal plate
  Starch is not the enemy here. It goes last on the plate rather than first, and that is the only rule this page has about it.
Your restrictions removed every option at this step. Anything soft, cooked and modest that fits them does the same job.
Day 3 onwards

Back to normal food Common practice, not trial-tested

Normal meals at normal sizes, from the list above or from your own kitchen. Keep the salt going for another day or two.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know
A large raw salad, or raw cruciferous vegetables Raw fibre is the hardest thing there is for a gut that has spent a day doing nothing. Bloating and cramps, reliably. Cook them and they are fine.
Deep-fried or heavily processed food Hard work to digest at the best of times, and this is not the best of times.
A large portion of nuts or seeds Dense, fatty and full of fibre. A handful in a meal is fine; a bowl of them as the first food is not.
A big glass of milk or a large serving of unfermented dairy Lactose tolerance is a spectrum, and a large dose of it as the first food after a day is how people who did not know they were at the sensitive end find out.
A large, fatty meal Fat slows the stomach down. That is useful when you are eating normally and unhelpful when the stomach is already slow.
Making up the missed calories in one sitting The day is the unit past 36 hours, not the meal. Spreading the food out is the single most useful thing on this list.
Going straight back to your normal training Give it a day. Hard training on the first day back stacks a second demand on top of the one your body is already dealing with. Working Out While Fasting: The Complete Guide
Caffeine on top of the first meal Coffee lifts colon motor activity within minutes, which is not what a gut coming back from three days needs on top of food.

How well this is known: The stepwise shape is drawn from a published clinic protocol followed by 1,422 people. That is real evidence for how it is done and not evidence that it works, because the study measured everybody at the end of the fast and nobody during the four days of eating that followed. Print this plan

5 days or longer

Established

Five days and beyond.

Break this one with medical supervision. This page will not give you a meal plan for it.

Talk to a clinician before you fast, not before you eat again. If you are already at the end of one, that conversation is today's job rather than tomorrow's.

The criteria, the rule about length alone, and what supervision actually involves are set out in full below.

What to avoid at first

A sugary drink or dessert as the first thing The one avoid line that applies at every band, and not for the reason usually given: the longer the fast, the BIGGER the glucose rise from the same carbohydrate, because a fast lowers insulin sensitivity rather than raising it. It is a spike, not a crash. Nothing about it is dangerous in a healthy person; it is simply the most pointless way to spend the first thing you eat.
Eating until you are full because you earned it The hunger after a long fast overshoots what you need, and it does not stop being hunger when you have had enough. Stop while you could still eat more.
Alcohol On an empty stomach after a long fast it arrives faster and hits harder, and it is a poor first thing to ask a quiet gut to process. Intermittent Fasting and Alcohol: What You Need to Know
A large raw salad, or raw cruciferous vegetables Raw fibre is the hardest thing there is for a gut that has spent a day doing nothing. Bloating and cramps, reliably. Cook them and they are fine.
Deep-fried or heavily processed food Hard work to digest at the best of times, and this is not the best of times.
A large portion of nuts or seeds Dense, fatty and full of fibre. A handful in a meal is fine; a bowl of them as the first food is not.
A big glass of milk or a large serving of unfermented dairy Lactose tolerance is a spectrum, and a large dose of it as the first food after a day is how people who did not know they were at the sensitive end find out.
A large, fatty meal Fat slows the stomach down. That is useful when you are eating normally and unhelpful when the stomach is already slow.
Making up the missed calories in one sitting The day is the unit past 36 hours, not the meal. Spreading the food out is the single most useful thing on this list.
Going straight back to your normal training Give it a day. Hard training on the first day back stacks a second demand on top of the one your body is already dealing with. Working Out While Fasting: The Complete Guide
Caffeine on top of the first meal Coffee lifts colon motor activity within minutes, which is not what a gut coming back from three days needs on top of food.

The part that is not a meal

Refeeding risk: who it is about, and what is actually done

Refeeding syndrome is a collapse in blood chemistry when somebody who has been starved for a long time starts eating again. It is real and it kills people, and it belongs to a specific group — so the honest answer has two halves and both of them matter. The checklist below is about the state a person was already in, not about the length of one fast. Read it before you fast rather than before you eat again.

Any ONE of these

BMI less than 16 kg/m²
Unintentional weight loss greater than 15% within the last 3 to 6 months
Little or no nutritional intake for more than 10 days
Low levels of potassium, phosphate or magnesium before feeding

Or any TWO of these

BMI less than 18.5 kg/m²
Unintentional weight loss greater than 10% within the last 3 to 6 months
Little or no nutritional intake for more than 5 days
A history of alcohol abuse, or drugs including insulin, chemotherapy, antacids or diuretics

The two tiers are asymmetric on purpose: the first fires on one item, the second needs two. The wording is the guideline's own, including its own phrasing about alcohol.

The rule that is about length alone

One recommendation in the same guideline does not depend on the checklist at all. It applies to anybody who has gone more than five days with little or nothing to eat, whatever else is true of them, and it is the single most relevant sentence in the guideline to a person who has chosen to fast for a week.

“People who have eaten little or nothing for more than 5 days should have nutrition support introduced at no more than 50% of requirements for the first 2 days, before increasing feed rates to meet full needs if clinical and biochemical monitoring reveals no refeeding problems.” NICE CG32, recommendation 1.4.5

What supervision actually means

Where the full criteria apply, this is the management. It is a treatment plan rather than a diet tip, and that is exactly why this page will not hand you a meal list instead of it.

Potassium, phosphate and magnesium are measured before feeding starts, and daily once it has.
Feeding restarts at a MAXIMUM of 10 kcal per kilogram of body weight a day — as little as 5 where the case is extreme — and is built up to full needs over 4 to 7 days.
Thiamine is given immediately before feeding and through the first 10 days, at 200 to 300 mg daily under the British guideline and 100 mg before feeding under the American one.
Potassium, phosphate and magnesium are supplemented from the start rather than corrected first.

Stop and get medical help

At any length, after you start eating again:

Confusion, or difficulty thinking clearly
Breathlessness
A racing or irregular heartbeat
Fainting, or feeling close to it
Swelling in the legs or ankles after you start eating again

None of those is a symptom to push through.

Is refeeding syndrome a risk after a 2 or 3-day fast?

Probable

Not in a healthy, well-nourished adult, as far as anybody has documented — and "not documented" is not the same as "zero".

The arithmetic is what settles it. The checklist clinicians use has one criterion about how long somebody has gone without food, and the shortest version of it is "little or no nutritional intake for more than 5 days" — which sits in the tier that needs two criteria met, not one. A person who was eating normally up to the hour the fast started, at a normal weight, with normal bloods, scores nothing on either list at 48 or 72 hours. The American guideline draws the same line in a different place, at 5 to 6 days, and also requires a second criterion alongside it.

The published cases of refeeding syndrome after a voluntary fast are an order of magnitude longer than a weekend: 40 days, 51 days. One of them is worth knowing about anyway, because the person had a body mass index of 23.1 and no medical history — the case report calls the normal BMI the red herring. A normal weight is not the protection people assume it is; the length of the fast is doing most of the work here.

What is genuinely true is that every threshold above was derived in hospitalised, malnourished or critically ill patients, and none of them has been validated in a healthy adult who chose to fast. So the honest version is: the criteria say you are not in the risk group, nobody has studied whether the criteria are right about you, and the reason this page still hardens its advice past two days is comfort and electrolytes rather than blood chemistry.

What actually happens in refeeding syndrome?

Established

Insulin returns, and it takes the minerals with it.

Through a long stretch without food the body runs on fat and ketones, insulin sits at a floor, and the phosphate stores inside cells quietly run down while the blood test still reads normal. Then carbohydrate arrives, glucose rises, insulin rises with it, and insulin drives phosphate and potassium into cells — from a normal-looking baseline that was never really normal. Phosphate is the one that matters most: it is the P in ATP, so the tissues spending the most energy feel it first. Magnesium falls too, by a mechanism the reference texts describe as less well understood.

Thiamine is the other half, and it is not an electrolyte at all. The body burns through it metabolising the carbohydrate it has just been given, and somebody who has been starved has usually run that store down already.

Timing, where it has been measured: in a group of intensive-care patients starved for at least 48 hours, a third developed low phosphate an average of 1.9 days after feeding restarted. A systematic review of 45 studies puts most cases inside the first 72 hours of feeding.

Does breaking a fast with sugar crash your blood sugar?

Established

No — and the measured effect runs the other way. A longer fast makes the glucose rise from the same carbohydrate BIGGER, not smaller, because short-term fasting lowers insulin sensitivity rather than raising it.

The numbers are unambiguous. Lean healthy adults given the same 75-gram carbohydrate breakfast after 12, 14 and 16-hour fasts showed a glucose response about a third higher after the longest fast, with no instance of low blood sugar in any condition. After a 36-hour fast, a glucose tolerance test in non-obese participants gave a two-hour reading of 109 mg/dL against 79 after twelve hours. On a clamp, insulin-mediated glucose uptake was lower after 62 hours of fasting than after 14. Even in a seven-day water fast with continuous monitoring, glucose went up when people ate again.

So where does the crash story come from? Almost certainly from people who have had bariatric surgery, in whom post-meal hypoglycaemia two to four hours after eating is real, well described, and caused by food reaching the small intestine faster than an intact stomach allows. The management for that group is small, low-carbohydrate meals — which is the advice that has been copied onto every fasting page on the internet, minus the surgery. Meanwhile the endocrinology guideline says plainly that post-meal symptoms without a documented low blood sugar are not caused by hypoglycaemia at all.

None of which makes a dessert a good first thing. It makes it a pointless one, for a reason worth stating correctly: it is a spike, not a crash.

Does starting with broth or something liquid actually help?

Common practice, not trial-tested

Nobody has tested it, and the only randomised evidence about easing back onto food points the other way.

The physiology behind the advice is real as far as it goes. Gastric emptying does slow after a fast — measured after 24 hours in fourteen healthy volunteers and after four days in twenty-three people — and liquids do empty roughly six times faster than solids. But the thing that actually governs how long the stomach takes is the number of calories delivered, not the physical form they arrive in. A large liquid meal empties slowly too. "Liquid" is doing none of the work in the popular version of this advice; "small" is doing all of it.

And the claim that a large first meal causes more bloating, nausea or cramping than a small one has never been tested in a human being. Where anybody HAS randomised how to reintroduce food — in acute pancreatitis, and after abdominal surgery — starting with solid food was tolerated as well as starting with clear liquids, with no difference in nausea, vomiting or distension. Those are inflamed and post-operative guts rather than fasted healthy ones, so the finding does not transfer. It is still the only randomised tolerance data that exists, and it does not support easing in with broth.

This page keeps the broth anyway, for a reason it can defend: it is a small, warm, salty thing that takes twenty minutes to get through, and the twenty minutes is the intervention. That is practice, it is labelled as practice, and if you would rather start with two eggs there is no evidence saying you are wrong.

Has anyone actually run a trial on what to break a fast with?

Probable

Once, that this site could find, and it was about ketones rather than comfort.

Twenty-seven sedentary adults with overweight or obesity did three 38-hour water-only fasts in random order. In two of them the fast was interrupted at exactly 24 hours by a shake of about 629 calories — one 70% carbohydrate, one 70% fat, otherwise identical. Water only produced 135% more of the main ketone body than the high-carbohydrate shake and 70% more than the high-fat one; the fat shake beat the carbohydrate shake by 39%. The carbohydrate shake also raised the glucose curve by 14% and lifted insulin. By the 38-hour mark none of the hormone differences remained.

What that gives you: if the point of the fast is ketosis, fat interrupts it less than carbohydrate does, and either interrupts it more than not eating. What it does not give you is anything about how the meal feels, because no gastrointestinal outcome was measured, and both arms were liquid so form was held constant rather than tested.

Beyond that one trial there is nothing. No study has compared a liquid first meal with a solid one, a small first meal with a large one, or protein-first with carbohydrate-first, with tolerance as the outcome, at any fast length, in any population. That is the honest state of this subject and it is why most of this page is labelled the way it is.

How good is the evidence behind any of this?

Established

For the syndrome itself, weaker than its reputation. For the meal advice on this page, mostly absent.

The systematic review that pooled 45 studies and 6,608 patients found the definitions so inconsistent that reported incidence ran from 0% to 80% depending on which one a study used, and concluded there was "no strong evidence regarding association of RFS and adverse outcomes, as well as regarding preventive measures and treatment algorithms". No randomised trial of treatment has been published; the guidelines rest on cohort studies, case series and expert consensus.

And the ordinary advice — broth first, wait twenty minutes, keep the first meal small — has no trial behind it at all. Nobody has compared a liquid first course against going straight to a plate after 24 hours. Nobody has measured the right first-meal size after 48. Every step on this page that is not the risk checklist is labelled "common practice, not trial-tested", because that is what it is, and a page that dressed it up as science would be doing the thing this site exists not to do.

Six things you will read elsewhere

What this page will not tell you, and why

Each of these was either in a draft of this page or is on most of the pages that rank for the same question. They are out because checking them changed the answer.

Breaking a fast with sugar causes a blood-sugar crashThe measured effect of a longer fast is a bigger glucose rise, not a lower one, and healthy people breaking fasts of 12 to 36 hours record no low readings at all. The crash belongs to people with rerouted stomachs after bariatric surgery.
A liquid first meal is gentler on your stomach than a solid oneGastric emptying is governed by the calories delivered rather than the form. The only randomised comparison of liquids against solids as a first meal — in acute pancreatitis — found no difference in tolerance.
Your stomach shrinks while you fastThe only human capacity measurements come from four weeks at 600 calories a day in people who lost nine kilograms. Nothing has been measured after an overnight or a one-day fast.
A large first meal after a fast causes bloating and nauseaReported constantly, tested never. There is no human study measuring symptoms against first-meal size at any fast length, which is why this page calls the small first meal practice rather than science.
Bone broth heals or seals the gut liningNot sourced, and broth's amino acid content is unreliable enough that published analyses disagree about what is in a cup of it. It is here because it is small, warm and salty.
Refeeding syndrome is a risk of a 48 or 72-hour fastNo criterion in either the British or the American guideline is met by a well-nourished adult at that length, and the published cases after a voluntary fast are 40 days and longer. Saying so is not the same as saying the risk is zero.

Where the numbers came from

Sources

Each was read on the date beside it rather than recalled. Where two guidelines publish different numbers for the same job — and on refeeding they do — this page names which one it is quoting instead of picking the tidier figure.

Nutrition support for adults: oral nutrition support, enteral tube feeding and parenteral nutrition (CG32) — recommendations 1.4.5, 1.4.6, 1.4.8 and box 1 National Institute for Health and Care Excellence · read 2026-08-31
Refeeding Syndrome (StatPearls) NCBI Bookshelf, National Library of Medicine · read 2026-08-31
Revisiting the refeeding syndrome: results of a systematic review (45 studies, 6,608 patients) Friedli et al., Nutrition, 2017 · read 2026-08-31
Refeeding syndrome: what it is, and how to prevent and treat it Mehanna, Moledina & Travis, BMJ, 2008 · read 2026-08-31
Refeeding syndrome in a patient with a normal body mass index after 40 days of near-total food deprivation Case report, PubMed Central · read 2026-08-31
Safety, health improvement and well-being during a 4 to 21-day fasting period in an observational study including 1422 subjects — the source of the stepwise 800 to 1600 kcal reintroduction over four days Wilhelmi de Toledo et al., PLoS One, 2019 · read 2026-08-31
The right foods after fasting — the clinic's own page, and the only place the apple appears. It calls the practice traditional Buchinger Wilhelmi · read 2026-08-31
The effects of a high-carbohydrate versus a high-fat shake on biomarkers of metabolism and glycemic control when used to interrupt a 38-h fast: a randomized crossover study Deru et al., Nutrients, 2024 · read 2026-08-31
Food order has a significant impact on postprandial glucose and insulin levels (n=11, metformin-treated type 2 diabetes) Shukla et al., Diabetes Care, 2015 · read 2026-08-31
Effect of food order on ghrelin, GLP-1 and postprandial glycemia (n=16, type 2 diabetes) Shukla et al., BMJ Open Diabetes Research & Care, 2017 · read 2026-08-31
Effect of food order on postprandial glucose in healthy individuals: a systematic review of six studies and 107 participants Kim et al., Clinical Nutrition Research, 2026 · read 2026-08-31
Effect of fasting duration on the postprandial glycaemic response — the longer fast raised the glucose response and produced no low readings PubMed Central · read 2026-08-31
Evaluation and management of adult hypoglycemic disorders — post-meal symptoms without a documented low glucose are not hypoglycaemia Cryer et al., Endocrine Society clinical practice guideline, Journal of Clinical Endocrinology & Metabolism, 2009 · read 2026-08-31
Gastric emptying of a non-nutrient liquid and a solid meal after a 12 and a 24 hour fast (n=14) Jones, Dockray & Thompson, Neurogastroenterology & Motility, 2012 · read 2026-08-31
Mechanisms of gastric emptying — the rate is governed by calories delivered, not by whether the meal is liquid Goyal, Guo & Mashimo, PubMed Central · read 2026-08-31
A prospective, randomized trial of clear liquids versus low-fat solid diet as the initial meal in mild acute pancreatitis (n=121) — the only randomised tolerance data there is Jacobson et al., Clinical Gastroenterology and Hepatology, 2007 · read 2026-08-31
Society for Endocrinology guideline on post-bariatric hypoglycaemia — where the small, low-carbohydrate first meal advice actually comes from PubMed Central · read 2026-08-31

Take it with you

Print the plan, or put this planner on your own site

The printable plan is one page for one fast length: the sequence with its timings, the avoid list, and the risk criteria where they apply. It is the thing to have on the counter when you are lightheaded and hungry and in no state to scroll a web page.

12–16h sheet 16–20h sheet 20–24h sheet 24–36h sheet 36–48h sheet 48–72h sheet 3–5 days sheet 5+ days sheet

Embed the planner

Free to use on any site. Paste this where you want it — the line underneath the frame is the credit, and it needs to stay visible, because a search engine reading your page cannot see inside an iframe.

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<p>Free <a href="https://getfasted.app/tools/how-to-break-a-fast">how to break a fast planner</a> by Fasted</p>

Preview the widget · every band renders as plain text on the server, so it works with scripts turned off.

Going in, and coming out

Before the fast ends, and while it is running

This page is the exit. The entrance is the what-breaks-a-fast checker, which answers whether a particular drink, supplement or mouthful ends the fast you are already in — five goals, one item at a time, and an honest “nobody knows” where that is the answer. The editorial version of the same question is what breaks a fast.

For the food itself rather than the sequence, the best foods to break a fast goes through the list properly. Extended fasting covers 24 to 72 hours hour by hour, including the refeeding section in full, and the extended fast planner lays out the fast itself before you get here. If you are building the habit rather than ending one long fast, the 30-day fasting challenge is the other end of the same shelf.

The whole fast, in four tools

These four were built to sit together. One plans the window, one answers what may go in while it runs, one handles the meal that ends it, and one covers the fasts too long to be a daily schedule.

Plan Fasting Schedule Planner When the window is, every day of the week — with a calendar file and a sheet.
Hold Does It Break a Fast? Whether a thing breaks the fast, item by item, for five different goals.
End How to Break a Fast — you are here. What to eat first when it finishes, in what order, by how long you fasted.
Longer Extended Fast Planner A single fast of 24 hours or more, planned hour by hour.

How to break a fast

Dietary restrictions

5 days or longer

What to avoid at first

How to break a fast, by how long you fasted

12 to 16 hours

What to avoid at first

16 to 20 hours

What to avoid at first

20 to 24 hours

What to avoid at first

24 to 36 hours

What to avoid at first

36 to 48 hours

What to avoid at first

48 to 72 hours

What to avoid at first

72 hours to 5 days

What to avoid at first

5 days or longer

What to avoid at first

Refeeding risk: who it is about, and what is actually done

The rule that is about length alone

What supervision actually means

Stop and get medical help

Is refeeding syndrome a risk after a 2 or 3-day fast?

What actually happens in refeeding syndrome?

Does breaking a fast with sugar crash your blood sugar?

Does starting with broth or something liquid actually help?

Has anyone actually run a trial on what to break a fast with?

How good is the evidence behind any of this?

What this page will not tell you, and why

Sources

Print the plan, or put this planner on your own site

Embed the planner

Before the fast ends, and while it is running

The whole fast, in four tools

How the plan is chosen

Where this comes from

Why the length is the whole question

Frequently Asked Questions

What should you eat after a 24-hour fast?

How do you break a 48-hour or 72-hour fast?

How much should you eat when you break a fast?

Why not just eat a big meal after a fast?

What is refeeding syndrome, and should I worry about it?

When does breaking a fast need medical supervision?

Does the order you eat things in actually matter?

Can you break a fast on a vegan or vegetarian plan?

Go deeper

Best Foods to Break a Fast (And What to Avoid)

Extended Fasting: 24, 36, 48 and 72 Hours Compared

Does Bone Broth Break a Fast?

More Tools

Does It Break a Fast?

Extended Fast Planner

Meal Window Planner

Time the fast in Fasted, and bring the plan back here