That's not quite true. In the newer edition of his book, he has a chapter for people who fail to lose any weight on induction. For those people he prescribes IIRC one week of a 1,000-calorie diet with 90% of calories from fat and 10% from protein, to be followed by a week of 1,200 daily calories (same makeup), followed by induction. He warns that short-term diet is dangerous for people whose metabolism isn't so out-of-whack as to require it, but states that it will help jump-start weight loss in the few people for whom induction by itself does not work.