Coffee is the one thing most people refuse to give up when they start fasting. The good news: you don't have to. But the answer depends entirely on how you drink it. Plain black coffee does not break a fast. It contains essentially zero calories, does not raise insulin, and is completely compatible with intermittent fasting. What you add to it is a different story. Fasting works by keeping insulin low. When insulin drops — typically after 12+ hours without…
Does Coffee Break Intermittent Fasting?
Black coffee doesn't break a fast — but what you put in it might. Here's the complete answer.
2026-05-18
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