Srila Prabhupada gives the prescription for good health....
Srila Prabhupada..."Because this body belongs to Krishna, and we are using it in His service, it should be kept in good working order. A little dal, a little rice, some vegetable and a few chapatties is a substantial diet, along with a little fruit and milk. Two cups of milk a day is sufficient. The Ayurvedic system of eating is to decide how much you can comfortably eat, then take half of that amount, filling the remaining half one quarter with water and leaving one quarter for air. This simple, regulated diet along with strict cleanliness will keep one healthy, strong and free from disease."
Srila Prabhupada's Letter to: Koumadaki -- Australia March 27, 197