Can you have butter coffee while intermittent fasting?
Butter coffee breaks a strict fast because butter adds calories and fat.
Step by step
The longer answer
Butter coffee breaks a strict fast because butter adds calories and fat. In everyday intermittent fasting, the easiest rule is to keep the fasting window to water, plain tea, and black coffee unless you intentionally follow a modified fast. Track the choice so you can see whether it affects cravings or consistency.
If butter coffee makes you hungrier, switch back to water, plain tea, or black coffee for a cleaner test.
Changing the rule for butter coffee every day and then not knowing what actually helped.
Track the fasting window, butter coffee, hunger, energy, and whether you finished the fast.
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.