Research library

Fasting insights

Peer-reviewed fasting research, translated into plain English.

Fasting causes muscle loss on multi-day water fasts, where two-thirds of the weight lost is lean tissue. Ten days of alternate-day fasting did not.

Fasting can switch on cellular recycling signals, but a one-day fast is not a guaranteed longevity shortcut.

Shorter eating windows may help body composition, but the evidence is stronger for weight and fat loss than for broad metabolic change.