Longevity Research
Separating hype from evidence. The boring stuff works. Most supplements don't. Healthspan matters more than lifespan.
~78
US male life expectancy
~66
healthy life expectancy
12yr
gap to close
$62B
anti-aging market
The longevity industry sells hope in pill form. Most of it doesn't work. Meanwhile, the proven interventions are boring: don't smoke, exercise, maintain healthy weight, control blood pressure, stay connected. These factors account for most of the variation in how long and how well you live.
Healthspan vs. Lifespan
The goal isn't more years—it's more good years. Average American men live to 78 but spend the last 12 years in declining health. Closing that gap matters more than extending lifespan. What's the point of living to 95 if the last 20 years are miserable?
Lifespan vs. Healthspan by Lifestyle
Impact of lifestyle factors on years of healthy life
Source: Li et al., Circulation 2018; GBD Study 2019
📊 The Five Factors
Harvard study: Combining these five factors adds 12-14 years of life expectancy:
- Not smoking
- Healthy weight (BMI 18.5-25)
- Regular exercise (150+ min/week)
- Moderate alcohol (0-1 drink/day)
- Healthy diet
🎯 What Kills the Healthspan
- Metabolic dysfunction: Obesity, diabetes, metabolic syndrome
- Cardiovascular disease: Heart attack, stroke, heart failure
- Cancer: Often related to lifestyle factors
- Sarcopenia: Muscle loss → falls → disability
- Cognitive decline: Dementia, Alzheimer's
- Social isolation: Loneliness accelerates decline
What Actually Works: The Evidence Hierarchy
Longevity Interventions by Evidence Strength
Relative effect size on mortality risk
Source: Compiled from multiple meta-analyses and RCTs
The boring stuff works best. Not smoking adds more years than any supplement. Exercise is the closest thing to an anti-aging drug. The $62B longevity industry is mostly selling hope, not evidence.
✅ Strong Human Evidence
- Don't smoke: Single biggest factor
- Exercise regularly: 150+ min/week; include resistance
- Maintain healthy weight: Avoid obesity
- Control blood pressure: Target <120/80
- Manage blood sugar: Prevent/treat diabetes
- Stay socially connected: Isolation kills
- Treat sleep apnea: If you have it
⚠️ Promising But Less Certain
- Mediterranean diet: Best-studied pattern
- Metformin: TAME trial ongoing; observational data promising
- Rapamycin: Works in mice; human longevity data lacking
- Time-restricted eating: May help; not proven for longevity
- Cold exposure: Interesting biology; no lifespan data
Popular Interventions: Reality Check
| Intervention | Evidence in Humans | Reality |
|---|---|---|
| Exercise | Strong | Decades of data; 30-40% mortality reduction; closest to "magic pill" |
| Not smoking | Strong | Adds 10+ years; quitting at any age helps |
| Statins | Strong | Proven mortality benefit for appropriate patients |
| BP medication | Strong | Prevents stroke, heart attack, heart failure |
| Metformin | Moderate | Promising observational data; TAME trial will clarify |
| Rapamycin | Weak | Works in mice; human longevity studies nonexistent |
| NAD+ precursors (NMN/NR) | Weak | Raises NAD+ in humans; no lifespan data |
| Resveratrol | None | Initial hype not confirmed; save your money |
| Most supplements | None | $62B industry selling hope, not evidence |
The translation problem: Many interventions extend lifespan 20-30% in mice but fail in humans. Mouse biology is different. What works in a lab under controlled conditions often doesn't translate. Be skeptical of "works in mice" claims.
✓ Your Longevity Action Plan
✓ Don't smoke (or quit now—it's never too late)
✓ Exercise: 150+ min/week cardio + 2-3x resistance
✓ Maintain healthy weight (BMI 18.5-25)
✓ Control blood pressure (<120/80)
✓ Manage blood sugar if diabetic/prediabetic
✓ Stay socially connected—isolation kills
✓ Get screened (colonoscopy, etc.) on schedule
✓ Be skeptical of longevity supplements—most don't work
📌 The Bottom Line
Healthspan > Lifespan
More good years matter more than more years. Close the 12-year gap.
The Boring Stuff Works
Exercise, not smoking, healthy weight, BP control—this is 90% of it.
Supplements Are Mostly Hype
$62B industry; almost nothing proven to extend human lifespan.
Start Now
The best time was 20 years ago. The second best time is today.
Sources & Further Reading
- Li Y, et al. Impact of healthy lifestyle factors on life expectancies in the US population. Circulation. 2018;138(4):345-355.
- Fontana L, Partridge L. Promoting health and longevity through diet: from model organisms to humans. Cell. 2015;161(1):106-118.
- Mandsager K, et al. Association of cardiorespiratory fitness with long-term mortality. JAMA Netw Open. 2018;1(6):e183605.
- Barzilai N, et al. Metformin as a tool to target aging. Cell Metab. 2016;23(6):1060-1065.
- de Cabo R, Mattson MP. Effects of intermittent fasting on health, aging, and disease. N Engl J Med. 2019;381(26):2541-2551.