Diet is one of a collection of lifestyle factors, including physical inactivity, poor sleep, tobacco use, stress and non-adherence to medical regimens that account for 80 percent of chronic disease. A whole foods, plant-based diet naturally low in fat and sugar has been scientifically proved to prevent and even reverse a wide variety of chronic diseases, including heart disease, Type 2 diabetes, hypertension and early-stage prostate cancer, especially when combined with moderate exercise, social support and stress management. Why? Because these illnesses share the same underlying biological mechanisms. Read how NY Times writer tested out an AI diet.