The author of "How Not to Die" presents the diet he claims can prevent and treat many of the factors that lead to disease-related death, and provides ground-breaking scientific evidence to support this claim. He contends that making small adjustments to diet and lifestyle can prevent the vast majority of premature deaths. Dr. Gregor looks at the top fifteen killers in America, including heart disease, various cancers, diabetes, Parkinson's, high blood pressure, and more, and he explains how lifestyle and nutritional changes can sometimes be more effective than medication and other medical procedures, allowing us to live longer and healthier lives.