What to eat to break a fast (without undoing your work)
Your first meal matters more than you think. What to eat to break your fast without blood sugar spikes or stomach trouble.
Part of the complete guide What breaks a fast (and what doesn't)
What the science saysHow to break an intermittent fast: what to eat first
To break a fast, go for a moderate meal that starts with protein, vegetables and healthy fat, leaving carbs for last: that order lowers the glucose and insulin spike that follows. After long fasts (more than 24-48 hours), reintroduce food gradually to avoid digestive discomfort and refeeding syndrome.
- Eating carbs last cut the glucose peak by 54% and the area under the curve by 53% versus eating them first (Shukla 2017). [1]
- Diets with 1.2-1.6 g protein/kg/day and 25-30 g per meal improve fullness and lean mass retention during weight loss (Leidy 2015). [2]
- Refeeding syndrome is a potentially serious complication of eating again after periods of fasting or malnutrition (Mehanna 2008). [3]
Why how you break your fast matters
After hours without food, your digestive system is at rest and your insulin is low. Break your fast with a pastry or juice and you set off a brutal blood sugar spike, followed by a crash that leaves you hungrier than before. Your first meal sets the tone for the rest of the day.
The rule: protein and fiber first
Break your fast with protein + fiber + good fats, saving fast carbs for the end of the meal or for later. That keeps blood sugar steady and fullness high.
Examples of an ideal first meal
- Scrambled eggs with avocado and tomato.
- Plain (or Greek) yogurt with nuts and seeds.
- A veggie omelet.
- A salad with protein (chicken, tuna, chickpeas) and olive oil.
If you are training right after, that is when you add some quality carbs (oats, fruit).
What to avoid when breaking your fast
- Juice and soda (blood sugar spike).
- Pastries and cookies.
- Huge, very fatty meals all at once (heavy digestion, discomfort).
- Eating in a rush: chew, your stomach was at rest.
If you have done a long fast (24 h+)
After long fasts, start gently: a bit of broth, some fruit or light protein, then wait. A huge meal out of nowhere can hit you hard. Reintroduce food in 2 stages, 30-60 minutes apart.
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Frequently asked questions
What is the best thing to break a fast with?
Can I break my fast with fruit?
How do you break a 24-hour fast or longer?
Scientific sources (3)
- Carbohydrate-last meal pattern lowers postprandial glucose and insulin excursions in type 2 diabetes. BMJ Open Diabetes Research & Care, 2017.
- The role of protein in weight loss and maintenance. The American Journal of Clinical Nutrition, 2015.
- Refeeding syndrome: what it is, and how to prevent and treat it. BMJ, 2008.