Dr Greger has written a book to change peoples lives from the inside out. He has changed my whole digestive tract within 2 weeks because of eating a plant based diet. It is wonderful to be pain free and eating such high amounts of nutrition. My complete blood picture taken last week has improved on every level. Cholesterol, glucose, uric acid and thyroid to name a few. I found the book riveting to read. So many facts supported by science. Anyone who follows this plant based protocol will have the best chance if a long and healthy life. A nutrition bible for everyone.