Of all the lame stuff I have seen or read online, this book makes sense! I don’t want to give up a food group - ever. So, this Physicist is giving me the option to power diet and still have my full on sugar cookies one night a week. I absolutely HATE sugar alcohols. Dr. Kiefer gives me the option to not have them. I’m relieved. If you want to know if I did this diet, I did. I lost 35 pounds in four months. I should say fat. It has been one of the best decisions I have made.