Harvard Gazette Q+A with JoAnn Manson, who along with Howard Sesso, co-led a collaboration between BWH and HSPH called the the COSMOS-Web Study. This study showed that among 3,500 subjects 60 and older, a daily multivitamin led to 3.1 years less cognitive aging than for those assigned a placebo. This clinical study was the second cognition trial in COSMOS to suggest that multivitamins can slow memory loss.