Longevity has become a market. Supplements, cold plunges, wearables, light panels and clinic packages all sell the same promise: buy the right protocol and you can slow aging. Some of what gets filed under "biohacking" is genuinely well supported. Most of it is not, and the gap between those two groups is much wider than the marketing suggests.
So here is the honest sort, by how strong the human evidence actually is.
Lifespan and healthspan are not the same target
Lifespan is how long you live. Healthspan is how much of that time you spend strong, mobile, clear-headed and independent. Nothing currently available to consumers has been shown to extend human lifespan. Quite a lot has been shown to protect healthspan — and honestly, that is the better target. Most people are not afraid of dying at 84. They are afraid of the ten years before it, spent unable to get off the floor.
What holds up
This is the part with real human outcome data behind it.
- Resistance training. Progressive strength work preserves muscle mass, strength and bone density as you age. This is about as well established as anything in exercise science, and it is the single intervention with the clearest line to staying independent.
- Cardiorespiratory fitness. Fitness level is one of the strongest predictors of all-cause mortality we have. Moving from unfit to moderately fit is where the biggest return sits, and it does not require anything exotic.
- Not smoking. Still the largest single modifiable factor. Nothing on the supplement shelf comes close.
- Blood pressure, blood sugar and lipids. Managing these with your physician does more for your long-term odds than any longevity product on the market.
- Sleep. Chronically short or fragmented sleep tracks with worse cardiovascular, metabolic and cognitive outcomes. Regular timing and enough hours is the intervention.
- Staying connected and staying engaged. Social isolation is consistently associated with worse health outcomes in older adults. This is not a soft add-on.
- Limiting alcohol. The consensus has shifted here. Alcohol is a risk to reduce, not a health strategy. Less is better.
None of that is novel or sellable. That is exactly why it gets skipped.
Plausible, but not settled
- Intermittent fasting. Short-term trials show modest changes in weight and some metabolic markers, largely explained by eating less overall rather than by the timing itself. There is no human evidence that it extends life. If a fasting window helps you eat well, it is a reasonable tool. It is not a longevity mechanism.
- Caloric restriction. Extends lifespan in several animal species. In humans the data is limited to short-term biomarker studies, and the trade-offs — lost muscle, lost bone, lost training capacity — are real. Treat the lifespan claim as animal evidence only.
- Heat and cold exposure. Regular sauna use has some interesting observational data attached to it, which is not the same as proof. Cold plunges mostly change how you feel in the short term. Neither has been shown to affect aging.
- Wearables and sleep tracking. Useful for noticing a pattern you would otherwise miss. There is no evidence that tracking itself improves outcomes, and for some people the anxiety it generates makes sleep worse.
Sold well ahead of the evidence
- NAD+ boosters (NMN, NR) and resveratrol. These reliably change a blood marker. They have not been shown to change a human outcome that matters. Not established.
- Red light therapy for aging. Very weak evidence. Any anti-aging claim here is unproven.
- Cryotherapy for cellular repair. No good evidence that it slows aging. At most it is a recovery modality with mixed, short-term, mostly perceptual findings.
- Senolytics, gene therapy and CRISPR. Legitimately interesting research, in early trials, in controlled settings. They are not consumer options and should not be presented as ones.
Being curious about this is not foolish. The underlying biology — senescent cells, mitochondrial function, telomeres — is real and worth studying. But an interesting mechanism is not the same thing as a demonstrated benefit in people, and a lot of money is currently being made in the space between those two.
Where to start
If you want the boring version that actually has evidence behind it: lift something heavy two or three times a week and make it progressively harder. Accumulate about 150 minutes of moderate activity weekly. Sleep on a consistent schedule. Get your blood pressure checked. Keep your social life. Drink less.
Spend your money on the equipment, coaching or time that makes those things happen consistently, rather than on a compound whose human evidence does not yet exist. If it ever does, the recommendation will change — that is how this is supposed to work.
One caveat worth stating plainly: this is general information, not a plan for you specifically. If you are managing blood pressure, a metabolic condition or a joint problem, the right starting point depends on findings from an actual assessment, not from an article.
If you want the training side of that built properly and progressed rather than guessed at, that is what our team does at Human 2.0 — you can book an assessment to get started.
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