longevity · Outcome
Years of healthy, disease-free life ahead.
How to measure:
Three levers, one stack. Each works through a different mechanism. They compound.
10% mortality reduction
2000-5000 IU daily
Evidence
Effect size
Research
38 papers
range 7–45 · n=5 quantitative claims
“Vitamin D3 supplementation decreases all-cause mortality in adults when analyzed across 56 randomized trials.”
Noticeable
45-120 min, 3-4x per week
Evidence
Effect size
Research
5 papers
0 small · 7 moderate · 2 large · 1 unclear
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We only surface a food once enough quality studies back it for this goal. None clear the bar yet. We add new research daily, so this can fill in soon.
Everything we found, ranked by how strongly we recommend it. Tap any to see the studies.
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Every pick has two signals. They answer different questions and we never bundle them into one number.
Effect size
How big is the change on healthspan, in the units that matter for this outcome.
Confidence
How sure are we the effect is real for healthspan, given the studies we have.
For every pick, the “papers” number is how many studies we've cataloged that test this entity for healthspan. “Favorable” means the study reported the direction you want.
The tier badge (S, A, B…) on the entity itself is its overall research confidence across all outcomes. It's the same letter wherever you see this entity on the site, not specific to healthspan.
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“Among males with high levels of occupational physical activity, high compared to sedentary leisure-time physical activity was associated with lower cardiovascular mortality risk (HR=0.79, 95% CI: 0.60-1.04).”