Fasting

Expert Positions

Andrew Huberman

Strongly Recommends TRF

Peter Attia

Nuanced — Moved Away from Prolonged Fasts

Rhonda Patrick

Strongly Recommends for Autophagy & Circadian Health

Bryan Johnson

Practices Strict Daily Fasting

Mark Hyman

Recommends as Hormetic Stress

The Verdict

All 5 experts endorse some form of fasting, but they differ substantially on protocol and emphasis. Huberman and Patrick are the strongest advocates, with dedicated episodes covering time-restricted feeding and its circadian, metabolic, and autophagy benefits. Johnson practices a strict 20-hour fast daily. Hyman practices a 14-hour overnight fast and frames fasting as a hormetic stress. Attia is the most cautious — he experimented extensively with prolonged fasting but moved away from it due to muscle loss concerns and a lack of objective biomarkers proving benefit.