This is an elimination diet that proposes to reset hormones to support weight loos and maintenance of a healthy weight. The diet is a modified paleo diet. However, the author makes some claims that weren't backed up. For instance, she says to stop eating red meat because of modern agricultural practices, but it's okay to eat chicken, which is just as bad. Now, if it's okay to eat a free-range chicken, then why isn't okay to eat grass-fed beef or pastured pork? She doesn't even address those issues. The language assumes (until late in the book) that there is no such thing as it isn't mentioned as an option.
I also felt that the advice regarding the reintroduction of foods was mixed. The advice to start with the food that was the most troublesome I thought was good. However, I'm not certain that the method is really structured enough to bring about a clear response if the food is a problem. Since sometimes multiple foods are removed in a step, a person could start eating different foods from a certain category and get mixed, or misleading, results. Since she doesn't mention foods that are relatively common allergens, this is even more confusing. For instance, many people are sensitive or allergic to eggs, but they are a key component of the diet from day one. The same goes for different types of fruit. She wants people to drink lemon water, but citrus may cause a sensitivity. These issues aren't addressed except to recognize that you shouldn't eat anything you know you are allergic to. Given that the purpose of an elimination diet is to figure some of that out, this is not a helpful approach.
Then there is the recommendation to repeat the diet regularly. Since it is essentially an elimination diet, and the follower now has stopped or reduced eating whatever caused a problem, why repeat it? By the end I didn't buy into the hormone reset result, or the fact that it would be needed again so regularly.