The longevity levers that actually work
The longevity industry wants healthspan to be expensive, plasma swaps, 100-pill stacks, full-body MRIs, exotic peptides, because expensive is profitable. The actual evidence points somewhere far less marketable: a short list of mostly free interventions that almost nobody does consistently. Here are the five that survive scrutiny, ranked by how much they move the needle.
1. Build cardiorespiratory fitness
If you do one thing, do this. Cardiorespiratory fitness, your VO2max, your aerobic engine, is one of the strongest predictors of all-cause mortality ever measured. In a meta-analysis, each 1-MET higher level of fitness was associated with an 11–17% lower risk of death, and the gap between the least-fit and most-fit groups rivals or exceeds the risk conferred by smoking, diabetes, or hypertension.[1] You build it with Zone 2 base work plus occasional higher-intensity efforts. No supplement comes within an order of magnitude of this.
2. Build and keep muscle
Muscle is the second lever, and it's two things at once: strength (function, fall prevention, independence) and metabolic reservoir (glucose disposal, resilience to illness). Strength and muscle mass independently predict mortality and the ability to live well into old age, and the way you protect them is unglamorous, resistance training plus enough high-quality protein to support muscle protein synthesis across the day.[2][3] Creatine is the one cheap, proven supplement that helps here.[3]
3. Manage the metabolic markers that cause the diseases
Most people die of a handful of diseases, cardiovascular disease, metabolic disease, and their downstream effects. The upstream markers are knowable and modifiable. ApoB (the particle count behind LDL) is causally tied to atherosclerotic cardiovascular disease in proportion to level and duration of exposure, so knowing and managing it is among the highest-leverage things you can do.[4] Glucose control and insulin sensitivity are the other half. This is why "get your bloodwork" beats "buy a longevity supplement" every time.
4. Sleep
Sleep is the foundation the other three are built on. Chronic short sleep degrades glucose control, appetite regulation, recovery from training, and cardiovascular health. It's free, and it's the lever people most readily sacrifice. Protecting 7+ hours amplifies every other intervention on this list.
5. Don't do the big-killer things
The least sexy lever and one of the most powerful: avoid the handful of behaviors with outsized mortality impact, smoking, excess alcohol, and sustained obesity. The downside of getting these wrong dwarfs the upside of any optimization gadget. (For some people with obesity, this is also where genuinely effective medical tools now exist.)
What's NOT on the list (and why)
Conspicuously absent: NMN, NR, resveratrol, exotic peptides, plasma swaps, cold plunges-as-lifespan-drug, and 40-capsule stacks. Not because they're all worthless, but because none has human evidence for extending lifespan, and every dollar and hour spent on them competes with the five things that demonstrably work. The longevity world has it backwards: it obsesses over the speculative 5% while neglecting the proven 95%.
Do this instead
- Train your aerobic engine, Zone 2 base + some intensity. This is the highest-ROI longevity act available.[1]
- Lift and eat protein, protect muscle and strength; take creatine.[2][3]
- Get bloodwork including ApoB, and manage glucose, measure, don't guess.[4]
- Sleep 7+ hours, it multiplies everything else.
- Skip the exotic stack, redirect the money and attention to the five levers above.[5]
FAQ
Single most powerful lever? Cardiorespiratory fitness (VO2max), each 1-MET improvement is tied to 11–17% lower mortality.
Do NMN/longevity supplements extend lifespan? No human evidence for it, they're sold on mechanism and animal data.
Is expensive biohacking worth it? Almost never relative to the basics; the proven levers are cheap or free.
References
- 1.Kodama S, et al. (2009). Cardiorespiratory fitness as a quantitative predictor of all-cause mortality and cardiovascular events in healthy men and women: a meta-analysis. JAMA 301(19):2024–2035. PMID: 19454641. Link
- 2.van Vliet S, Burd NA, van Loon LJ (2015). The skeletal muscle anabolic response to plant- versus animal-based protein consumption. Journal of Nutrition 145(9):1981–1991. PMID: 26224750. Link
- 3.Kreider RB, et al. (2017). International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation. Journal of the International Society of Sports Nutrition 14:18. PMC5469049. Link
- 4.Ference BA, et al. (EAS Consensus Panel) (2017). Low-density lipoproteins cause atherosclerotic cardiovascular disease. European Heart Journal 38(32):2459–2472. DOI: 10.1093/eurheartj/ehx144. Link
- 5.Kreider RB, et al. (2017). ISSN position stand (contrast with unproven 'longevity' supplements). Journal of the International Society of Sports Nutrition 14:18. PMC5469049. Link
This article is for educational purposes only and is not medical advice. It is not a substitute for professional diagnosis, treatment, or the guidance of a qualified clinician. Always consult your physician before changing your diet, starting a fast, taking supplements, or beginning a new training or heat/cold protocol, especially if you are pregnant, breastfeeding, managing a medical condition, or taking medication.