The China-Oxford-Cornell Diet and Health Project directed by T. Colin Campbell and colleagues showed that chronic diseases such as heart disease are not inevitable consequences of aging.
Medicare is now accepting for reimbursement the Dean Ornish Program for Reversing Heart Disease and the Pritikin Program, which, on a personal note, is what inspired me to go into medicine.
Profile of an editorial published by Dr. Dean Ornish in the American Journal of Cardiology describing the optimal diet and how simple choices can be as powerful as drugs and surgery.