Greger is a physician, author, and internationally recognized public health expert specializing in clinical nutrition. He is the founder of NutritionFacts.org, a non-profit organization dedicated to providing free, evidence-based information on health and nutrition. Greger’s background as a physician, combined with his extensive research in nutrition, positions him as a credible and authoritative voice on the topic of diet and health. His work emphasizes The Role of Nutrition in Disease Prevention and Reversal, which is the central theme of How Not to Die.

In How Not to Die, Greger draws from his reviews of thousands of scientific studies to build a case for the health benefits of plant-based nutrition. He explores the impact of diet on the leading causes of death, such as heart disease, cancer, and diabetes, and provides practical advice on how to incorporate healthier food choices into daily life. Greger’s influence on the book is significant, as he serves as not only the primary researcher and author but also an advocate for lifestyle medicine—a field that promotes health and disease prevention through diet and lifestyle changes rather than medication.

Greger’s personal dedication to public health extends beyond his writing. He frequently lectures around the world, sharing his knowledge on nutrition and health with both professional and lay audiences.