A Mediterranean-type diet rich in protein, vitamin B3 and zinc can boost heart health, according to a new study. File photo by Africa Studio/Shutterstock May 3 (UPI) — People who consume a Mediterranean-type diet high in nutrients such as protein, zinc and vitamin B3 may see improvements in heart health, a study presented Tuesday found. After one year on a weight-loss program that included personalized exercise plans, as well as nutrition modifications centered around a “low-calorie, high-protein” form of the Mediterranean diet, 72 participants saw 9% reductions in body weight, the researchers said. In addition, their measurements on several key indicators of heart health — including assessments for arterial stiffness,…