Intermittent Fasting Patterns
Time-restricted eating; metabolic signal real, hormonal effects context-dependent.
Evidence base
Time-restricted eating shows metabolic improvements in short-term RCTs. Long-term outcome data limited. Effects vary significantly by sex, age, and existing metabolic status.
Mechanisms
- Extended nightly fasting period
- Circadian alignment of eating
- Autophagy activation (animal models)
- Caloric reduction (often unintentional)
Studied populations
- Overweight adults in short-term RCTs
- Prediabetic populations
- Self-selected IF practitioners
Likely strengths
- Simple behavioral framework
- No food group elimination required
- Metabolic improvements in short trials
Open questions
- Optimal eating window by sex and age
- Effects on female reproductive hormones
- Long-term adherence and outcomes
- Interaction with exercise timing