Dr. Dean Ornish has spent the past 30 years studying the effect exercise, a low-fat diet and stress reduction can have on health. Ornish was the first to show that these lifestyle changes could actually reverse severe heart disease without drugs or surgery.
Ornish's latest book, "The Spectrum," offers advice on how to personalize a health plan to fit your goals and preferences — without diets, deprivation or guilt.
Read the first chapter of "The Spectrum" below.
Chapter One: It Works!...Full Story