What To Eat After Breaking A Fast: UK Guide 2026 | Complete Nutrition

Understanding Fasting

What to eat after breaking a fast

After 16:8: a normal balanced meal with protein, vegetables and some fat. After 24 hours: smaller meal than usual, eaten slowly. After 36 to 48 hours: start with bone broth or soup, small balanced meal an hour later. After extended fast over 3 days: very careful gradual refeeding over 2 to 3 days to prevent refeeding syndrome. Avoid refined carbohydrates, sugar and alcohol at any duration. The first meal sets the tone. Eat slowly, smaller than your hunger suggests, prioritise protein.

Visit the Fasting Hub

Updated:
May 2026

Written by:
Dominic Walton, MD

Reading time:
7 min

The full answer

What to eat after fasts of different lengths

The right refeeding strategy depends on fast length. Four scenarios cover the main protocols.

1. Breaking a daily fast (12 to 18 hours, 16:8 etc)

A normal balanced meal is fine. The body is well within its normal physiological range and does not need special handling. Aim for 30 to 40 g protein (eggs, fish, chicken, Greek yogurt, lentils, beans), generous vegetables, some healthy fat (olive oil, nuts, avocado), some intact whole-food carbohydrate if desired (sweet potato, brown rice, fruit). Eat at normal pace. Stop when comfortably full. Examples: scrambled eggs with mushrooms and spinach, salmon with salad and avocado, Greek yogurt with berries and nuts, lentil soup with bread.

2. Breaking a 24 hour fast

A smaller balanced meal than usual, eaten slowly. Most people feel uncomfortable if they break a 24 hour fast with a large meal. A bowl of soup, small portion of fish or eggs, some steamed vegetables and a slice of bread is plenty. Eat at normal pace not fast. Stop when comfortably full. Resume normal eating with the next meal. Avoid starting with refined carbohydrates or sugar which produce strong glucose spikes after the fasting state.

3. Breaking a 36 to 48 hour fast

Start small. Bone broth or vegetable soup as a starter. Wait an hour. Then a small balanced meal: eggs with vegetables, small portion of fish with steamed greens, small bowl of porridge with berries. Eat slowly, stop when comfortably full not stuffed. Wait 2 to 3 hours. Next meal can be closer to normal size. Avoid breaking with refined carbohydrates, alcohol, sugar, large portions or fried foods. Some people experience temporary digestive sensitivity to dairy after extended fasts.

4. Breaking an extended fast over 3 days

Careful gradual refeeding over 2 to 3 days, ideally with medical input. Day 1: roughly 500 kcal of easily digested foods (bone broth, eggs, white fish, well-cooked vegetables). Day 2: roughly 1000 kcal. Day 3: increase toward maintenance. NICE Clinical Guideline 32 covers refeeding syndrome prevention for high risk individuals (low BMI, prolonged severe restriction). Phosphate, potassium, magnesium and thiamine supplementation may be needed under medical guidance.

Food choices

The best and worst foods for breaking a fast

Five categories of food and how to think about each.

Protein: prioritise

Eggs, fish, chicken, lean meat, Greek yogurt, cottage cheese, tofu, tempeh, lentils, beans. Protein produces minimal glucose spike, supports satiety, preserves lean mass during ongoing fasting practice. Aim for 30 to 40 g protein in the first meal after most fasts. Protein-led meals also reduce risk of reactive hypoglycaemia compared to carbohydrate-led meals.

Vegetables: prioritise

Leafy greens, cruciferous vegetables, peppers, mushrooms, courgette, asparagus, salad vegetables. Provide fibre, micronutrients and bulk without major glucose impact. Pair with protein in the first meal. Cooked vegetables may be easier to digest than raw after extended fasts.

Healthy fats: include moderately

Olive oil, avocado, nuts, seeds, oily fish, eggs. Slow gastric emptying and reduce glucose response of any accompanying carbohydrate. Include but do not overdo: large amounts of fat in the first meal after fasting can cause digestive discomfort.

Whole-food carbohydrates: moderate amounts fine

Sweet potato, brown rice, oats, whole fruit, legumes, intact whole grains. These produce moderate glucose responses with fibre buffering. Include for energy and satisfaction. Avoid making them the dominant component of the first meal especially after longer fasts.

Avoid: refined carbohydrates, sugar, alcohol

White bread, pastries, sugary cereals, sweets, fruit juice, sweetened drinks, white pasta, alcohol. Strong glucose spikes, possible reactive hypoglycaemia 2 to 4 hours later, undermines metabolic effects of the fast, can cause digestive discomfort. Alcohol hits hard on fasted physiology and is best avoided for at least the first meal or two.

Safety

Refeeding safety considerations

Specific risks to be aware of when breaking fasts.

Refeeding syndrome after extended fasts. NICE Clinical Guideline 32 covers prevention. Gradual refeeding mandatory for high risk individuals.
Reactive hypoglycaemia from refined carbohydrates. Low blood sugar 2 to 4 hours after sugary refeeding meal. Symptoms: sweating, shakiness, weakness.
Severe digestive discomfort from large meals. Stomach has been at rest, large meals cause significant discomfort.
Alcohol intolerance during refeeding. Reduced tolerance, can cause hypoglycaemia combined with fasting state.
Dairy intolerance temporary after extended fasts. Some people experience digestive symptoms with dairy after several days of fasting.

Standard contraindications for fasting apply: eating disorder history, pregnancy or breastfeeding, type 1 diabetes or insulin dependent type 2 diabetes, BMI under 18.5, children, adolescents and adults under 18. Anyone breaking extended fasts (over 3 days) should ideally have medical input on the refeeding period.

For the wider picture on fasting from the gentlest protocols to extended fasts plus the science behind hunger, metabolism and refeeding, our Understanding Fasting hub brings every guide together in one place.

Part of the hub

Back to the Fasting Hub

This article sits inside our complete knowledge base on fasting covering protocols, physiology, safety and practical guidance. Head back to the hub for the full index.

Visit the Fasting Hub

Keep reading

More practical fasting guidance

Several pages cover practical fasting topics. Our piece on what to eat before a fast covers the pre-fast meal. Refeeding after extended fasting covers the longer fast scenarios. And how to fast safely covers the overall safety picture.

Frequently asked

Breaking a fast questions

What should I eat after a fast?

Depends on fast length. After 16:8 fast: a normal balanced meal with protein, vegetables and some fat. After 24 hour fast: smaller meal than usual, eaten slowly. After 36 to 48 hour fast: start with small portion of bone broth or vegetable soup, then a small balanced meal an hour later. After extended fast over 3 days: very careful gradual refeeding over 2 to 3 days to prevent refeeding syndrome (NICE Clinical Guideline 32). Avoid refined carbohydrates, sugar and alcohol at any duration.

What is the best first meal after a fast?

For short fasts (up to 24 hours): eggs with vegetables, salmon with salad, Greek yogurt with berries and nuts, chicken with steamed greens, lentil soup. These provide protein, fibre and some healthy fat. For longer fasts (36 to 48 hours): start smaller with bone broth or soup, then progress to similar balanced meals. The first meal should be smaller than your normal portion. Eat slowly. Stop when comfortably full. Avoid breaking fasts with refined carbohydrates.

Should I have carbs after fasting?

Yes some, but not refined carbs. Whole food carbohydrates with fibre (vegetables, legumes, intact whole grains, fruit) are fine and beneficial. Refined carbohydrates and sugar (white bread, pastries, sugary drinks, sweets, fruit juice) produce strong glucose spikes after the fasting state and can trigger reactive hypoglycaemia 2 to 4 hours later. The principle: refeed with foods that produce moderate glucose responses rather than dramatic spikes.

Why should you avoid sugar after fasting?

Three reasons. First insulin sensitivity is heightened after fasting so sugar produces stronger insulin response than usual. Second the strong insulin response can trigger reactive hypoglycaemia 2 to 4 hours later (low blood sugar with sweating, shakiness, anxiety). Third sugar undermines the metabolic effects of the fast. Better to break with protein and fat which produce gentler glucose responses and allow gradual return to normal metabolism.

Can I drink alcohol after breaking a fast?

Best avoided immediately after a fast. After fasting your tolerance is reduced. Liver is in glycogen-depleted state. Alcohol on an empty fasting stomach hits hard. Combined with low blood glucose after fasting alcohol can cause significant hypoglycaemia. The 1992 Festi study did not address alcohol specifically but the general advice across medical fasting guidance is to avoid alcohol for the first meal or two after breaking a fast. After extended fasts, avoid alcohol for at least 2 to 3 days.

How much should I eat after a fast?

Less than you might want. After short fasts (up to 24 hours): smaller portion than your normal meal, eaten slowly. After longer fasts (36 to 48 hours): substantially smaller first meal followed by another small meal 2 to 3 hours later, normal eating from third meal. After extended fasts (over 3 days): careful gradual refeeding starting around 500 kcal day 1, increasing over 2 to 3 days. The instinct to compensate for fasting with a large meal usually causes discomfort and undermines results.

What is a typical eating window after fasting?

For daily intermittent fasting (16:8 etc) the eating window is your normal 8 hours. For 24 to 48 hour fasts you typically have evening break followed by normal eating the next day. For extended fasts you need 2 to 3 days of careful refeeding before returning to normal eating. The recovery period scales with fast length. Returning to normal eating too aggressively after long fasts causes discomfort, reactive hypoglycaemia or in severe cases refeeding syndrome.