Best Foods to Break a Fast (And What to Avoid at All Costs)
✨ Key Takeaways
- Learn the best practices of intermittent fasting for optimal health.
- Understand how to track your fasting windows effectively.
- Discover the science-backed metabolic benefits of fasting.
In This Article
The best foods to break a fast are gentle, nutrient-dense, and easily digestible whole foods: bone broth, eggs, cooked non-starchy vegetables, avocado, and wild fish. After fasting for 16 to 24+ hours, your digestive system is in a dormant state with reduced digestive enzyme and stomach acid production. Breaking your fast correctly prevents digestive distress, avoids severe blood sugar spikes, and maximizes nutrient absorption.
⚡ The 3 Golden Rules of Breaking a Fast
- 1. Start Small: Begin with a small pre-meal (e.g., warm bone broth or half an avocado) 20-30 minutes before your full meal.
- 2. Prioritize Protein & Healthy Fats: High protein preserves muscle and prevents reactive hypoglycemia.
- 3. Avoid High-Glycemic Carbs: Refined sugars, pizza, and pastries after fasting cause severe insulin spikes and fatigue.
What to Eat vs What to Avoid When Breaking a Fast
The 2-Phase Refeeding Protocol for Fasts Over 18 Hours
For fasts exceeding 18–24 hours, follow this 2-phase approach:
- Phase 1 (The “Primer” – 30 mins before): 1 cup of warm bone broth with a pinch of salt, or 2 scrambled eggs. This gently awakens stomach acid and gastric enzymes.
- Phase 2 (The “Main Fuel”): A balanced whole-food meal: grilled salmon, roasted sweet potatoes, and steamed spinach with olive oil. Calculate your target calories using our TDEE Calculator.
Track Your Fasts and Meal Timing
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Download Fasting Tracker for iOS →Medical References
- Mattson MP et al. (2018). Intermittent metabolic switching, neuroplasticity and brain health. Nature Reviews Neuroscience.
- Popkin BM et al. (2010). Water, hydration, and health. Nutrition Reviews.
📚 Scientific Studies & Medical References (5 Sources) ▼
FastingTracker adheres to strict editorial standards, citing peer-reviewed clinical trials and authoritative medical institutions.
- New England Journal of Medicine (2019): de Cabo R, Mattson MP. Effects of Intermittent Fasting on Health, Aging, and Disease. N Engl J Med. 381(26):2541-2551. PubMed 31881139 • DOI
- Cell Metabolism (2014): Levine ME, Suarez JA, Brandhorst S, et al. Low Protein Intake and Periodic Fasting Promote Longevity and Autophagy. Cell Metab. 19(3):407-417. PubMed 24606898 • DOI
- Obesity (Silver Spring, 2018): Anton SD, Moehl K, Donahoo WT, et al. Flipping the Metabolic Switch: Understanding and Applying Health Benefits of Fasting. Obesity. 26(2):254-268. PubMed 29086496 • DOI
- Annual Review of Nutrition (2017): Patterson RE, Sears DD. Metabolic Effects of Intermittent Fasting. Annu Rev Nutr. 37:371-393. PubMed 28715993 • DOI
- Autophagy (2010): Alirezaei M, Kemball CC, Flynn CT, et al. Short-term fasting induces profound neuronal and systemic autophagy. Autophagy. 6(6):702-710. PubMed 20534972 • DOI
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