This book is great for breaking down why some food is just plain bad for you and why you should give it up for a while until your body heals itself. A lot of people have told me it is just like Whole 30 where you stop eating bad for you foods for 30 days and see if you actually have an intolerance to them by introducing them back into your diet slowly and one at a time. In practice, this is really hard work. Making sure that you don't eat a certain food in the group is like almost impossible. Saying that, I do have to say the short week or two I did implement the diet I felt really good inside and out. Worth the read if you are thinking of other ways to lose weight and feel like yourself again.