Fasting, myths and science
Claims people repeat about fasting, set next to studies this library has opened. Only published notes are listed.
Each note states the claim, where it comes from, what the opened studies show, what is still unknown, and a plain bottom line. The list grows when a note is published.
The claim that autophagy switches on at a set hour is already covered in Autophagy: what it is and what headlines get wrong.
Educational only. Not medical advice. See our disclaimer.
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- Part 1: Does fasting improve your eyesight?: Studies of fasting that this note opened found no change in a glasses prescription or in chart sharpness. They were Ramadan daytime fasts. The blood sugar studies involved diabetes or a forced sugar spike, not a fast in healthy people.
Fasting Fundamentals · How to make fasting easier · Longer fasts · Very long fasts · Using the Clock · Everyday Fasting · Questions from the community · History of Fasting · Humans, Food & Feast–Famine · What Research Suggests