There are plenty of ways to keep your brain sharp as you age, from staying socially engaged to getting enough sleep . Research increasingly shows that what you choose to put on your plate can also help strengthen memory and slow cognitive decline . Many of the best foods for a healthy brain are featured in the MIND diet, which is “like if the Mediterranean and DASH diets had a baby,” says Liz Weinandy, a registered dietitian and instructor of practice in dietetics and nutrition at the Ohio