What it is
Regulatory status: dietary timing pattern, not a drug or device
Mechanism evidence: human
At a glance
What it is, why people use it, the evidence, and what to know before trying it.
Why people use it
- Weight loss
- Metabolic health
- Simpler calorie control
Evidence at a glance
Time-restricted eating can produce modest weight and metabolic changes, often similar to other approaches when calories are comparable. A 16:8 schedule is a practical pattern, not uniquely proven to extend life in humans.
Confidence: moderate
Practice safety
Situations where this practice may need modification or professional guidance.
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.
- active eating disorder
- pregnancy without clinical guidance
- insulin and other glucose-lowering medicines
Forms and variants
This review does not automatically apply to:
- alternate-day fasting
- 5:2 fasting
- multi-day fasting
- religious fasting
- early time-restricted eating with a different window
Seen in protocols
Public protocols that include 16:8 intermittent fasting. Open one to see the full context and source.