Dr. JoAnn Manson, a professor of medicine at Harvard Medical School and Brigham and Women’s Hospital, discussed a recent study presented at the 2025 American Heart Association Epidemiology, Prevention, Lifestyle & Cardiometabolic Health Scientific Sessions in New Orleans. The study, known as the Cocoa Supplement Multivitamins Outcomes Study (COSMOS), explored whether daily multivitamin supplementation could slow biological aging, as measured by DNA methylation in epigenetic clocks.