Scientists find possible link between multivitamins and slower aging

A new study suggests that taking a daily multivitamin could modestly slow biological aging in older adults, though experts say the findings should be viewed with caution.

The research, published in the journal Nature Medicine, analyzed data from the COcoa Supplement Multivitamin Outcomes Study (COSMOS), which examined the health effects of supplements in adults. 

Researchers reviewed blood samples from 958 healthy participants with an average age of 70 to study DNA methylation, a biological marker used to measure aging at the cellular level.

Participants were assigned to different groups taking combinations of cocoa extract, multivitamins, or placebos during the two-year trial. 

Results showed that those who took a daily multivitamin experienced slightly slower biological aging, equal to about four months less aging, compared with other groups.

Researchers say the effect may be linked to higher levels of antioxidants such as carotenoids and vitamin E, which help protect cells from damage.

However, experts stress that the findings do not prove that multivitamins extend life. A previous study in JAMA Network Open found no clear link between multivitamin use and lower mortality risk.

Health specialists say a balanced diet remains the most reliable way to support healthy aging.