Prediabetes and Obesity affect 40% of the American Population. Why is that and what can be done. This is an instructional book to help you understand diet, nutrition, food, and health. You will understand what happens when you eat and don't eat, and how the food you eat affects you. I am counting on you to have some common senses. I am not a real doctor and you would be crazy to take my advice. Disregard that last statement as some would take that as a medical diagnosis. At the end, you will have more practical knowledge about these conditions than the majority of health care advisers whose keep telling you to eat less and exercise more. I will tell you why this doesn't work in the majority of people who were already smart enough to try that without paying somewhat to give them that advice. There are no footnotes in this book. Some of the knowledge you gain is widely accepted, some not everyone will completely agree with, and some you have never heard before. I confine the discussion to recorded human history and will not be guessing what someone was eating a million years ago. I am going to assume the human body was designed to maintain health. OK, I am going to admit that the human body was created to maintain health and somehow we screwed it up. I will not claim to cure diabetes, but will give you information that will help manage it. I so think I can prevent most with prediabetes from becoming diabetic. I will give you the best chance you have of treating your obesity. By the end of the book, most of you will at least understand what diabetes/prediabetes/obesity is and how you got there. I will not advise you to eat less and exercise more. Actually I will advise you to fast at least 12 hours a day and, if you have diabetes, may advise you to exercise a little to save some money. We are going to use diet therapy and no medications (except insulin) will be mentioned. Well I guess I will mention statins in the addendum on lipoproteins, but that's it. I have repeated some of this information in my other books, Ketogenesis for Beginners and Autophagy for the Common many, as well as referenced a book that is not quite ready, Fasting for Health, but most of the material directed toward the topics in the title. Most of the material can be found elsewhere, and some of the conclusion exist in other sources: but, I have explained this information so you can understand and use it to help you and your family in a practical manner that can be continued for the rest of your life. At some point some of you may say "I don't know if this guy know's what he's talking about", but hold on sill the end. I am counting on your common sense and have a great desire to improve the health and diet of our nation, regardless of what government dietitians have been telling you. It may seem I am a little harsh on health care providers, but these same people who can create miraculous cures for cancer can't five you any advice on what to eat for dinner.