Daily Multivitamins May Slow Biological Aging in Older Adults, New Study Finds

A new study published in Nature Medicine suggests that taking a daily multivitamin may help slow biological aging in older adults. Researchers analyzed data from nearly 1,000 participants aged 60 and older and found that those who took a multivitamin experienced slower changes in two key “epigenetic clocks,” which measure biological aging through DNA methylation. 

The study drew from the large COcoa Supplement and Multivitamin Outcomes Study (COSMOS), a randomized, double‑blind, placebo‑controlled trial conducted between 2016 and 2020. Participants who took multivitamins showed measurable reductions in the pace of aging compared with those who received a placebo. The effect was especially strong among individuals whose biological age was already higher than their chronological age. 

Researchers emphasized that while many older adults take multivitamins without knowing whether they help, these findings offer promising evidence that supplementation may support healthier aging. However, they also noted that cocoa extract — another supplement tested in the study — showed no measurable impact on aging. 

https://www.healio.com/news/primary-care/20260414/daily-multivitamins-might-slow-biological-aging-in-older-adults