Daily Multivitamins May Slow Cellular Aging by Four Months

Breakthrough Study Reveals Anti-Aging Benefits

A groundbreaking study has revealed that something as simple as taking a daily multivitamin could help slow the aging process at the cellular level. Researchers from Harvard and Mass General Brigham found that older adults who took a multivitamin daily for two years experienced slowed biological aging by about four months . During the 24 months, they aged only 20 months at a cellular level .

The research, published in Nature Medicine, analyzed data from nearly 1,000 healthy participants with an average age of 70. Compared to the placebo-only group, people in the multivitamin group had slowing in all five epigenetic clocks, including statistically significant slowing in the two clocks that are predictive of mortality. The changes equated to about four months less biological aging over the course of two years .

"There is a lot of interest today in identifying ways to not just live longer, but to live better," said senior author Howard Sesso, a preventive medicine specialist at Mass General and a Harvard Chan School epidemiologist. "It was exciting to see the benefits of a multivitamin linked with markers of biological aging. This study opens the door to learning more about accessible, safe interventions that contribute to healthier, higher-quality aging."

Understanding Biological vs. Chronological Age

The research focused on biological aging, which reflects wear and tear on the body at the cellular level . Unlike chronological age, which simply measures time since birth, biological age provides insight into how well your body is functioning internally. Chemical changes on DNA called DNA methylation in specific parts of the genome can help estimate a person's biological age .

The study used sophisticated "epigenetic clocks" to measure these cellular changes. In the people who took the supplement, the clocks' rate of increase slowed by around 1.5 to two months per year compared with the clocks of those who took a placebo. While the researchers saw an effect with two epigenetic clocks called PCPhenoAge and PCGrimAge, three other epigenetic clocks included in the study showed no statistically significant change to their speed .

Additionally, people who were biologically older than their actual age at the start of the trial benefited the most. What's more, people who had shown signs of accelerated biological aging at the start of the trial saw a greater benefit from daily multivitamins .

The Science Behind the Study

The new study, which uses data from the well-established COcoa Supplement Multivitamins Outcomes Study (COSMOS), analyzed DNA methylation data from blood samples of 958 randomly selected healthy participants with an average chronological age of 70. Participants were randomized to take a daily cocoa extract and multivitamin; daily cocoa extract and placebo; placebo and multivitamin; or placebos only. Samples were analyzed for changes in five epigenetic clocks from the start of the trial and at the end of the first and second years .

The study was rigorously designed as a randomized controlled trial, considered the gold standard in medical research. The study was funded in part by Haleon, formerly Pfizer Consumer Healthcare, which provided the multivitamins, and Mars Inc., which provided the cocoa extract . However, neither company had any role in designing the study, analyzing data, or preparing the results.

Realistic Expectations and Expert Perspectives

While the findings are encouraging, experts emphasize that multivitamins are not a fountain of youth. "It's important to keep the magnitude of the effect in perspective," said Michelle Routhenstein, preventive cardiology dietitian at EntirelyNourished, who was not involved in the study. "These are changes in biomarkers, not direct evidence of fewer heart attacks, cancers, or longer life span. So I would view the findings as encouraging but still preliminary" .

Multivitamins are not a magic fix, but can be beneficial when combined with other healthy lifestyle habits . The research suggests that this simple, affordable intervention could complement other healthy aging strategies like regular exercise, a balanced diet, and adequate sleep.

As the population ages globally, finding accessible ways to promote healthier aging becomes increasingly important. This study provides hope that something as simple as a daily multivitamin might offer meaningful benefits for cellular health, particularly for those already showing signs of accelerated aging.