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Fasting, food, and the science behind both

Plain-language writing on the questions people actually ask about fasting and calories. No miracle claims, no 30-day transformations — just what the evidence supports and where it runs out.

Fasting basicsJuly 30, 20267 min read

What actually breaks a fast?

Coffee, gum, sweeteners, supplements, toothpaste — a practical guide to what ends a fast, what doesn't, and why the answer depends on why you're fasting.

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Short lessons on why fasting works.

Fastiq has the science built in — bite-sized chapters you can finish on a coffee break, with your progress saved as you go.

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Fastiq built-in fasting lessons chapter map

Want something covered? Suggest it on the feedback board — we write about what people ask about.