I like the idea of the book. And there is some good stuff in there. BUT, I was hoping for more DNA science. He is against getting your DNA tested, and the promise is that there are self tests you can do to determine what you need in your diet based on your unique genetic code. But there are only a couple self tests. For those of us who already have had our DNA tested, I was hoping there would be some specific genetic information that could be cross-referenced with our results. Especially since there are a lot of examples in the book of how different genes can make a huge difference. One example he gives is of a man who lost a lot of weight and got in great shape on a high protein diet and by training for triathlons, but then starting getting sick, even though he was still sticking to his diet and training, it turned out that based on his genes, he was getting too much iron and it was causing him to get sick, so he needed to cut back on foods high in iron. Great example, but no information on how to tell from a self test or from the DNA results you already have, how to detect if could be an issue for you.
Overall, if you are looking for something that explains really well why there is no "one size fits all" diet, and why some people need carbs while others thrive on low carb, then this is a great book.It makes clear how what works for your sister might fail miserably for you. Of course, the last section of the book is the author's own DNA Restart Diet plan. If you are looking for info on specific genes, that's not really here.