Trudeau's weight-loss book describes a grueling, 500-calorie-a-day diet, as well as hormone treatments. The deception, Guzman explained, came in Trudeau's infomercials that misrepresented the contents of the book as laying out "a simple, no hunger ... diet-free method of losing weight," which enticed more people to buy the book.You can write a book saying anything you want to, but you can't advertise the book as not requiring dieting when it does. That's fraud.
Although I suspect anybody who followed the diet did indeed lose weight!