The Hottest Diet Plans Again, the DASH diet comes to mind! US News and World Report released its report the healthiest diets in the market, and the DASH diet has been named as the most popular diets today. TLC came in second place, and the Mediterranean diet was third. While Weight Watchers came first for food business being marketed to the general public and the sixth in the overall diet, the DASH diet reigns when it comes to popularity, in part because of its Heart Health Foundation. The DASH diet was developed to help people with high blood pressure, and it is heavy on fruits and vegetables and light on saturated fat, salt and sugar.