Does black coffee break a fast?
Written by
Chen Jialiang
Reviewed by
Prof. William Dalton, Ph.D.To understand the effect of black coffee on fasting, it is necessary to know what breaks a fast from a physical standpoint. Plain black coffee has less than 5 calories per cup which means it can be consumed during fasting hours. Since it has so few calories, it does not trigger an insulin response allowing your body to remain in its fat-burning mode.
The caffeine found in black coffee enhances fat oxidation during fasting periods. It stimulates the central nervous system, resulting in a 3-11% increase in metabolic rate. Accordingly, coffee is a useful tool for morning fasting, since not only does it help the insatiable appetite, but it also increases the effectiveness of the fasting regime.
Allowed Beverages
- Black coffee: Plain without additives
- Herbal teas: Unsweetened varieties
- Water: Still or sparkling
- Electrolyte water: Without sweeteners
Prohibited Beverages
- Coffee with milk/cream: Triggers insulin
- Sweetened coffee: Contains sugars
- Bulletproof coffee: High fat content
- Diet sodas: Artificial sweeteners
For maximum benefit, time your coffee consumption wisely. Drink black coffee in the last few hours of your fast to curb hunger and boost energy. Restrict your intake to 2-3 cups per day to prevent sleep loss or caffeine dependence and maintain the benefits of fasting.
Special populations must be careful with coffee fasting. Those with adrenal fatigue or anxiety may require alternatives such as herbal teas. Pregnant individuals should restrict caffeine to less than 200mg daily. Hydration should always be a priority, especially when drinking coffee.
Read the full article: 8 Most Effective Fasting Methods Explained
