I was so disappointed after reading this book--it's nothing but the same information from his previous book-- Plant Paradox with the exception of a few new 'studies' added. While I do appreciate his research, I do believe that the eating guidelines he emphasizes are sooooo restrictive--no meats, no dairy, no grains, very few fruits-- and by the way don't bother training for a marathon-- that you may live a long life but you may die stressing over all the things you can't eat and shouldn't do--so what's the purpose of living! I have given up a number of foods (nightshades, grains some fruits, some dairy), but his approach is if you don't follow 'all-the-guidelines' just invest in his supplements. At least with Dr Lipman and Dr Hyman's programs, I can still enjoy the art of eating and running without the fear!!!