Quick Studies: A snapshot of the latest research on diet, exercise, and more

a bowl of nuts

A Mediterranean diet may lower blood pressure and help keep arteries from stiffening as you age. Thinking about popping a vitamin to help your memory or focus? “Be up for life,” say ads for Boost High Protein drink, which is made by Nestlé. “What I do count on is staying happy and healthy,” declares the vibrant older woman. Nuts may boost sperm count, which dropped by half worldwide from 1973 to 2011.