The Longevity Stack: What the Evidence Actually Supports
Strip away the supplement marketing and the biohacking theatre, and the interventions with real evidence behind them are unglamorous, cheap, and boring. That's the point.
Aria Wells
Performance Desk
The longevity conversation has been captured by the most expensive and least proven end of the spectrum. Infrared chambers, exotic peptides, a cabinet of supplements with mechanisms that sound impressive and trials that don't exist. Meanwhile the interventions with the strongest evidence are the ones nobody can sell you at a premium.
This is general information, not medical advice — talk to your doctor before changing anything. But here is what the data actually supports, ranked by how much we know.
Tier one: overwhelming evidence
- Cardiorespiratory fitness. Of every marker studied, VO₂ max is among the strongest predictors of all-cause mortality. Moving from "below average" to "above average" fitness is associated with a larger risk reduction than almost any drug. This is the single highest-leverage thing most people ignore.
- Strength and muscle mass. Maintaining strength into later decades predicts independence and survival. Resistance training two to three times a week is not optional infrastructure.
- Sleep. Consistent, sufficient sleep regulates nearly every system that ages you. No supplement compensates for chronically skipping it.
The most powerful longevity intervention available to you is a pair of running shoes and a barbell, used consistently for decades.
Tier two: strong, with nuance
- Protein intake sufficient to preserve muscle, especially as you age past fifty.
- Stable metabolic health — keeping blood sugar and blood pressure in good ranges, which the tier-one habits largely take care of.
- Social connection, which the long-term cohort studies keep finding matters as much as the physical markers.
Tier three: interesting, unproven
Most of what's sold as cutting-edge lives here: the trendy supplements, the cold-and-heat protocols, the wearables promising optimisation. Some may prove out. None has the weight of evidence behind it that a brisk daily walk does — and several carry costs, financial or physiological, that the marketing omits.
The honest stack
If you did only the boring things — train your heart, train your muscles, sleep properly, eat enough protein, stay connected to people — you would capture the overwhelming majority of the available benefit, for almost no money. The expensive stack is what people reach for to avoid doing the cheap one. The evidence is unromantic, and it has been the same for a long time: the fundamentals, done relentlessly, win.