U.S. News evaluated and ranked the 29 diets below with input from a panel of health experts. To be top-rated, a diet had to be relatively easy to follow, nutritious, safe, and effective for weight loss and against diabetes and heart disease. The government-endorsed Dietary Approaches to Stop Hypertension (DASH) snagged the top spot…#3 This is the Mayo Clinic’s take on how to make healthy eating a lifelong habit. It earned especially high ratings from our experts for its nutrition and safety and as a tool against diabetes. Experts found it moderately effective for weight loss.