Does bulletproof coffee break a fast?
Bulletproof coffee breaks a strict fast because butter or oil adds significant calories.
Step by step
The longer answer
Bulletproof coffee breaks a strict fast because butter or oil adds significant calories. It may fit a low-carb routine, but it is not calorie-free fasting. If your goal is a clean fasting window, treat bulletproof coffee as something for the eating window. If you are doing a modified fast, define your rule clearly and track it consistently.
Use Fast Goblin notes to mark gray-area choices like bulletproof coffee, then compare hunger and consistency over a few fasts.
Assuming bulletproof coffee is automatically fasting-safe without checking the label or your fasting goal.
Track whether you had bulletproof coffee, the time, hunger level, and whether it made the fast easier or harder.
Educational only. People who are pregnant, breastfeeding, under 18, have diabetes, take glucose-affecting medication, have a history of eating disorders, or feel unwell should speak with a qualified clinician before fasting.
