Tom Barfield spent 34 years as an electrical engineer in Raleigh, North Carolina, and retired the week after his 65th birthday. He signed up for Medicare, booked a fishing trip, and figured he would get around to finding a new doctor eventually. Eleven months later, a friend mentioned something called

Adults who drank two to three cups of coffee a day over decades faced a substantially lower chance of developing dementia, according to a Harvard-led study that tracked 131,821 health professionals for up to 43 years. The research, published in JAMA under the title “Coffee and Tea Intake, Dementia Risk,