Guides
GuideMeasures
Do biological age tests actually work?
What the reliability studies found when they measured the same sample twice, and then measured the same person twice.
6 min read
GuideHabits
Evidence: Cohort — as far as the evidence goes.
How many steps a day lower the risk of dying?
The 10,000-step target has no research behind it. Two pooled analyses show where the benefit actually starts and where it flattens out.
6 min read
GuideResearch Watch
How to read a longevity study
Six questions that separate a result worth acting on from a headline, and the published evidence for why each one matters.
10 min read
GuideCompounds
Evidence: Meta-analysis — as far as the evidence goes.
NMN: what the human trials actually found
Fifteen randomised trials have been pooled. The supplement is well tolerated, raises NAD+, and did not move most of the things people buy it for.
5 min read
GuideCompounds
Evidence: RCT — as far as the evidence goes.
Rapamycin for longevity: what human trials show
The mouse result is solid and the human result is thin. A look at what the 48-week trial in healthy adults actually measured, and what it found.
7 min read