08/30/2026
MOST ANTI-AGING SUPPLEMENTS DON'T MOVE YOUR CLOCKS
A new Nature Medicine analysis ran 51 human intervention studies through 16 epigenetic aging clocks. 3,128 blood samples. One pipeline.
What moved biological age:
→ Prescription drugs: metformin, semaglutide, anti-TNF therapies — strongest decreases
→ Lifestyle: diet (Mediterranean, low-carb, low-fat) + exercise combined — consistent decreases
→ DunedinPACE, the rate-of-aging clock, decreased in 16 of the interventions and increased in only 1
What mostly didn't:
→ Over-the-counter supplements
→ Several medical procedures
→ 19 of 51 interventions moved a clock at all. 13 held up after statistical correction. 5 made aging WORSE.
Read that again. Most things people buy for longevity showed no measurable effect on the biomarkers being sold to track it.
This is the largest audit of its kind, from Yale. It doesn't prove supplements are useless — it proves most of them were untestable or failed the test.
Actionable takeaway: before you buy another supplement, check whether it survived a clock test like this. Diet, exercise, and evidence-based prescriptions are where the signal actually is.
Physical age vs biological age is the RS core problem. Now we know which levers actually bend the biomarker.
Full paper:
The responsiveness of 16 different epigenetic aging clocks to a broad array of pharmacological and lifestyle interventions in humans was assessed across 51 different longitudinal studies, providing insights into the potential of aging clocks to serve as reliable aging biomarkers.