Daily multivitamin may slow the body's aging clock, COSMOS trial finds

A large randomized COSMOS trial found that a daily multivitamin slowed two epigenetic aging clocks over two years (about 2.7–5.1 months of aging delay), with the greatest benefit seen in participants biologically older than their actual age; experts caution that slowing epigenetic clocks may not translate to fewer age-related diseases, and long-term health outcomes require more research.