Multivitamins May Slow Biological Aging, Landmark Study Suggests

For decades, the efficacy of dietary supplements has been a subject of intense debate. Now, a long-term, randomized controlled study led by researchers at Brigham and Women’s Hospital and Harvard Medical School offers compelling evidence that daily multivitamin intake may slow the biological aging process in older adults. The findings, published in Nature Medicine, suggest a potentially accessible and cost-effective intervention for improving public health.

Proof Through Epigenetics

The study analyzed data from nearly 1,000 participants in the COSMOS (COcoa Supplement and Multivitamin Outcomes Study) trial, with an average age of 70 years. Over a two-year period, one group received a broad-spectrum multivitamin and multimineral (MVM) complex, although a control group received a placebo. Researchers utilized “epigenetic clocks” – sophisticated tools that analyze DNA profiles in blood samples to estimate biological age relative to chronological age – to measure the effects.

The results indicated that participants taking multivitamins experienced slower aging, as measured by two second-generation biological clocks: PCPhenoAge and PCGrimAge. Cocoa extract, also tested in the study, showed no significant impact on these indicators. Researchers believe that acting on these biomarkers could potentially slow down the overall aging process.

Measurable Impact on Health and Healthcare Costs

The study demonstrates that daily multivitamin consumption may help “slow down” cellular wear and tear. By assessing participants’ biological age, researchers observed significant rejuvenation in cellular clocks. While the annual gains may seem modest, they accumulate over time; over a decade, this could translate to a potential reduction in cancer risk of 3 to 7%.

Participants taking multivitamins also reported improvements in overall health, including reduced inflammation and better-preserved cognitive function. The effect was particularly noticeable in individuals who exhibited signs of premature aging at the study’s outset, suggesting that supplements may serve as a safety net, addressing common age-related dietary deficiencies.

The societal implications are substantial. Widespread adoption of this simple habit could significantly reduce public health costs associated with age-related diseases. “It is an extremely cost-effective intervention accessible to all to live better, longer,” explains Howard Sesso, epidemiologist and lead author of the study. He believes these results pave the way for effective preventive medicine, where a daily habit can act as a shield against biological decline.

Toward Preventive and Predictive Medicine

This research represents a significant advancement in the field of dietary supplements, validated by peer review and primarily funded by the United States National Institutes of Health. Understanding these epigenetic biomarkers is crucial for a new approach to healthcare. Identifying these signatures in DNA could potentially allow for disease prediction up to twenty years before the onset of symptoms.

The Brigham and Women’s Hospital is a recognized leader in patient care, teaching, and research, with a strong Department of Medicine dedicated to innovation and patient-centered services (Brigham and Women’s Hospital Department of Medicine). Research at institutions like Brigham and Women’s, in collaboration with Harvard Medical School, continues to push the boundaries of medical understanding, as exemplified by the work of labs like the Joshi Lab, focused on drug delivery technologies (The Joshi Lab) and the Innovative Biomaterials Lab (Innovative Biomaterials Lab).