Semaglutide Cut Biological Age by 3-5 Years in 108 Adults Over 32 Weeks
Updated
Updated · spacedaily.com · Jun 16
Semaglutide Cut Biological Age by 3-5 Years in 108 Adults Over 32 Weeks
2 articles · Updated · spacedaily.com · Jun 16
Summary
A randomized, double-blind trial found weekly semaglutide injections lowered biological age by about 3.1 years on leading epigenetic clocks and by up to 5 years on the most sensitive measures, while placebo showed no comparable shift.
The 108 participants had HIV-associated lipohypertrophy, a condition linked to accelerated aging, and blood samples taken at baseline and week 32 showed the strongest gains on clocks tied to morbidity and mortality risk.
DunedinPACE, a measure of current aging speed, slowed by about 9% in the semaglutide group, a larger effect than the 2% to 3% slowing reported in the CALERIE caloric-restriction trial over two years.
Researchers said the likely drivers are lower inflammation, less visceral fat and improved metabolic function, though the study could not separate a direct anti-aging effect from benefits secondary to weight and metabolic changes.
The paper, first posted as a 2025 preprint and later published in Nature Communications in 2026, adds to broader GLP-1 research but does not yet show the same effect in the general population or prove longer lifespan.
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Semaglutide and Biological Age: Clinical Evidence, Measurement, and the Future of Anti-Aging Medicine
Overview
Semaglutide, a medication originally developed for obesity, is now being studied for its potential to prevent or delay chronic diseases linked to aging. Novo Nordisk is generating data suggesting that semaglutide may influence biological processes beyond weight loss, possibly addressing broader age-related health challenges. While comprehensive results are still in development, ongoing clinical trials are exploring its effects on biological age, often using advanced 'aging clocks' to measure changes. These studies highlight semaglutide's emerging role in anti-aging research, with the hope that it could one day help improve health and longevity by targeting the underlying mechanisms of aging.