1 (tie): Mediterranean diet

The Mediterranean diet is modeled on foods commonly eaten in countries along the Mediterranean Sea. It's typically high in fruits, vegetables, fish, and whole grains like whole wheat and brown rice. Studies have linked the diet with a number of health benefits, including a reduced risk of heart disease and breast cancer. Some research has suggested the diet could also have potential memory-related benefits.

US News & World Report named the plan the best plant-based diet of the 40 considered, and it was deemed the easiest to follow.

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