Clinical trial · Supplements / medicine · 9 Mar 2026
Two years of a daily multivitamin slowed five epigenetic clocks by about four months
Source: EurekAlert
What the research found
Study (RCT analysis). Mass General Brigham investigators report from COSMOS that older adults taking a daily multivitamin for two years showed slower aging across five DNA-methylation clocks versus placebo, including significant slowing on two clocks that predict mortality — about four months less biological aging over two years, with larger effects in people who started biologically older than their years. Clock change is not proof of fewer diseases or longer life. Educational supplement notes, not a reason to start or stop prescribed medicine, and not a disease treatment claim.
Evidence level: Clinical trial. This is among the stronger kinds of evidence, but one study rarely settles a question.
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