What it’s for
- Organising meal timing and energy intake
An eating schedule with an approximately eight-hour food window and sixteen-hour overnight fast.
Purpose, evidence and practical considerations.
Trials show modest weight and metabolic effects, often comparable to other approaches when calories are similar. The schedule has not been shown to extend human life.
Confidence: moderate
Fasting can cause hunger, headache, dizziness, irritability, or low blood glucose. It may be unsuitable during pregnancy, for eating-disorder risk, in children, or with glucose-lowering medicines unless clinically supervised.
Time restriction shortens the daily eating window and may reduce energy intake or align intake with circadian biology. Effects depend on window timing, calorie intake, adherence, sleep, and baseline metabolic health.
Regulatory status: dietary timing pattern, not a drug or device
The evidence on this page does not automatically apply to:
How people use it, with their schedules, context and original sources.
daily eating window in the September 2025 snapshot · Schedule details
Session and schedule patterns reported in public protocols; these are observations, not instructions. Private and hidden usage is excluded.