New research suggests that daily multivitamin supplementation may modestly slow the pace of biological aging in older adults. A randomized clinical trial, published in Nature Medicine, found that individuals taking a multivitamin for two years experienced epigenetic changes indicating roughly four months less biological aging compared to those taking a placebo.
Understanding Epigenetic Clocks
The study leveraged “epigenetic clocks” – sophisticated tools that estimate biological age based on changes in DNA. These clocks don’t look at the DNA sequence itself, but rather at how genes are expressed through modifications like DNA methylation. These modifications accumulate with age and have been shown to correlate with mortality rates and overall health decline.
Why this matters: While chronological age (years since birth) is straightforward, biological age reflects how well your body is functioning. Slowing biological aging is a key goal in longevity research, as it suggests interventions that could extend healthy lifespan.
The COSMOS Trial Findings
Researchers from Brigham and Women’s Hospital, Harvard Medical School, and Augusta University analyzed data from the COcoa Supplement Multivitamins Outcomes Study (COSMOS). The trial included 958 participants with an average age of 70, randomly assigned to one of four groups: daily multivitamin + cocoa extract, cocoa extract only, multivitamin only, or placebo only.
Blood samples were analyzed at the start of the trial, after one year, and after two years to track changes in five epigenetic clocks. The multivitamin group showed slowing in all five clocks, with statistically significant results observed in two clocks that are strong predictors of mortality.
Key takeaway: Participants who took a multivitamin showed the equivalent of four months less biological aging over the two-year study period. The effect was most pronounced in individuals who were already biologically older than their chronological age at the study’s outset.
Future Research and Implications
Researchers plan further studies to determine whether the observed slowing of biological aging persists after the trial concludes. Dr. Howard Sesso of Harvard Medical School notes that many people take multivitamins without knowing their potential benefits, highlighting the value of rigorous scientific investigation.
“Within COSMOS, we are fortunate and excited to build upon a rich resource of biomarker data to test how two interventions may improve biological aging and reduce age-related clinical outcomes.”
The findings suggest that daily multivitamin supplementation may represent a simple, accessible intervention for supporting healthy aging, though further research is needed to confirm long-term effects and identify optimal dosages.
The study provides encouraging evidence that readily available supplements could contribute to slowing the biological aging process, potentially leading to improved healthspan and reduced age-related disease risk.
