I had the carbohydrate flu the 2nd day of the 21 day diet. Eliminating all sugar, dairy, and CHO's hit me just like the flu and it was God-damn awful. Thank the lord, I was over it about 36 hours later! The recipes were not that great because A. I'm a really good cook, and B. The recipes call for an over abundance of seasonings. I began trolling websites for healthy recipes that were way better. Recipes like Brussels sprouts hash with mushrooms at Closet Cooking. Cauliflower rice recipe at Damm delicious is awesome with some modifications to fit the bone broth diet guidelines. The great part of the diet is, I finally have the homemade bone broth down and it is amazing. It is so good and tasty that I don't have to add salt, pepper, dill - nothing. I will say that I look ravenously at the clock for 7 pm so I can have an acceptable snack on Fasting Days ( Fasting Days are twice per week and it's basically bone broth, coffee, tea and water.). Now the 21 days have come and gone and I have loosened up some restrictions, like a little dairy use. I lost a modest 11 pounds over the past month and that was with exercise. So, I would give this book a 3.5 star rating because I did not like the menu/recipes.