What the evidence consistently supports
Across multiple cohort and intervention studies, six lifestyle factors are repeatedly associated with lower biological age scores: cardiorespiratory fitness, resistance training, sleep duration and quality, whole-food diet patterns, non-smoking, and effective stress management. The effect sizes are larger than most therapies in published data.
Lifestyle interventions with the strongest signal
- Cardiorespiratory fitness: top 25% VO2 max for age associated with substantially lower mortality risk
- Resistance training: 2-3 sessions weekly, multi-joint, progressive load
- Sleep: 7-9 hours, consistent timing, manage apnea if present
- Whole-food diet: emphasis on plants, protein, minimally processed; specific named patterns matter less than the principle
- Non-smoking: documented to lower epigenetic age estimates over time after cessation
- Stress management: mindfulness, social connection, time in nature; the evidence is softer but real
Therapies with associated effects
Several clinical interventions have shown associations with biological age improvement in observational or small interventional data. None reliably lowers biological age in large blinded RCTs, and we say so:
Therapy associations
| Population | Strength | Notes | |
|---|---|---|---|
| HRT (postmenopausal women) | Postmenopausal | Moderate observational | Likely via cardiovascular and bone effects |
| GLP-1 therapy (metabolic) | Metabolic disease | Emerging | Visceral fat reduction is the mediator |
| TRT (hypogonadal men) | Confirmed low T | Moderate | Body composition and metabolic changes |
| NAD+ precursors (NR) | General | Emerging | Raises blood NAD+; clinical endpoints less clear |
| Senolytics (research) | General | Weak | Animal data; human RCTs ongoing |