ABC News Los Angeles affiliate KABC-TV featured research by Valter Longo of the USC Leonard Davis School that a primarily plant-based diet paired with intermittent fasting may lead to a longer life. “In most cases people who have a high protein diet don’t do very well. I favor a very specific carbohydrate, eat a lot of legumes and vegetables. Those are the good carbohydrates,” he said. Longo also noted that if an individual eats good quality food, he or she can also eat more of it.