This book was highly informative and a great "condensed companion" to the documentary film. I watched the film and then read the book right after and it really helped to cement the knowledge into my brain. Essentially, this book espouses the benefits of a nutritarian diet--a diet in which you focus on consuming foods high in nutrients but low in calories. As someone who has been slowly cleaning up and cleaning out their diet for years, I found this book to be "the next level". Highly recommend it to anyone who wants to get healthy and clean out their body from inside to out!