Memory loss and dementia are major fears for aging adults, but a new study suggests a sweet way to stave off those brain woes: Drinking hot cocoa daily. Farzaneh Aghdassi Sorond, HMS assistant professor of neurology at Brigham and Women’s Hospital, is the lead author of the study. Can Ozan Tan, HMS instructor in physical medicine and rehabilitation at Spaulding Rehabilitation Hospital, co-authored an accompanying commentary.