HOME / GUIDES / HOW TO BREAK A FAST

How to break a fast

The longer the fast, the more the first meal matters. After 16 hours you can eat normally. After 48 you should start small and build.

What to eat, in what order, at each fast length.

UP TO 24 HOURS

Eat a normal meal

A 16:8 or 18:6 needs no special protocol. Lead with protein, keep the portion reasonable, and get on with your day.

The only real mistake here is treating the window as a reward and eating back the whole deficit.

24 TO 48 HOURS

Start smaller than you want to

Something light first: broth, eggs, yogurt, cooked vegetables. Wait half an hour, then eat properly if you still want to.

Appetite after a day fasted is a poor guide to how much you can comfortably eat.

BEYOND 48 HOURS

Build back over hours

Broth and something small, then a light meal an hour or two later, then normal eating from the next meal onward.

Extended fasts of several days should be planned with a doctor, and that includes how you come off them.

The order matters

Protein first, then everything else

What you put first on the plate decides how the next few hours feel. This holds at every fast length.

Protein

Eggs, fish, meat, yogurt. The most filling thing on the plate and the one worth prioritizing after a long gap.

Vegetables and fat

Cooked rather than raw is easier on an empty stomach after a longer fast. Olive oil, avocado, nuts alongside.

Carbohydrate last

Rice, bread and potatoes are fine, but a large plate of them on their own after a fast is what produces the slump an hour later.

Take your time

Fullness signals lag behind eating. Take about twenty minutes over the first meal rather than finishing it quickly.

Common mistakes

Four ways a good fast gets undone in twenty minutes

Eating back the whole deficit

This is why some people fast for months without a result. Two normal meals in the window, not a feast.

Breaking a long fast with a large sugary meal

Uncomfortable after 24 hours and worse after 48.

Forgetting salt entirely

Broth works well as a first thing partly because it carries sodium, which a long fast depletes.

Pushing through when you feel unwell

Ending a fast early is a normal decision, not a failure. Burn logs a shorter fast just as readily as a completed one.

Burn's Fast Complete screen showing the duration, the stage reached and effort

Burn's Journal showing water tracked against a daily total and an Electrolytes card logging sodium, potassium and magnesium

Ending it in Burn

The end of the fast is recorded, not judged

Burn shows the duration, the stage you reached and how hard it felt. A fast ended at 14 hours is a 14 hour fast in your history, which is more useful than a gap.

Log how it felt

Effort recorded at the end is what makes the history worth reading later, when you are deciding whether to lengthen a schedule.

Water and electrolytes carry over

The Journal keeps hydration on the same daily view as the fast, which matters most on the day you break a long one.

All features → Electrolytes guide →

Stop and eat if you feel unwell

Dizziness that does not settle, heart palpitations, shaking or confusion mean ending the fast now, whatever the timer says.

Speak to a doctor before fasting if you are pregnant or breastfeeding, have a history of eating disorders, manage diabetes, take medication timed to meals, or are under 18. Fasts beyond 48 hours should be planned with a doctor.

Every fast, start to finish

Burn names the stages on the way up, records the duration and effort at the end, and keeps the history you can act on.

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