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This is quite possibly the worst book I have ever seen. Definitely the worst I have purchased, which is why I am returning it. The publisher should be ashamed. It is riddled with mistakes, poor grammar and “facts” that are not cited. The table of contents tag is repeated twice! Beyond the pure mistakes the book is so simplistic. You can learn much more about intermittent fasting and low carb from a simple internet search. Really really disappointing.