ABC News’ Dr. Darien Sutton explains new research suggesting that taking a daily multivitamin may modestly slow biological aging. Reported March 17, 2026, the study used epigenetic “clock” measures — patterns of DNA methylation that estimate biological age — to compare people who took daily multivitamins with those who did not.
Researchers observed a small but statistically significant reduction in biological age among regular multivitamin users over the study period. Investigators suggest that vitamins’ roles in antioxidant defense, DNA repair and metabolic support could help explain the association.
Experts urge caution. Limitations include relatively short follow-up, potential residual differences between groups, and uncertainty about which specific nutrients or doses might drive any benefit. Epigenetic clocks are evolving tools; changes in these biomarkers do not necessarily mean lower disease risk or longer lifespan.
Practical takeaways: multivitamins can help fill dietary gaps for people with limited diets or known deficiencies, but they are not a proven longevity cure. Dr. Sutton advises consulting a healthcare provider before starting supplements, because some vitamins can interact with medications or be harmful in high doses.
Researchers call for larger, longer randomized trials to confirm the findings, identify effective formulations and determine whether biomarker changes translate into real health and lifespan benefits. Meanwhile, proven strategies for healthier aging remain a balanced diet, regular physical activity, adequate sleep and avoiding tobacco.