The rumor mill churned instantly. Did he have surgery? Was it a fad? The answer, revealed years later, was surprisingly methodical, deeply intellectual, and rigidly disciplined. This roadmap to his new body is now infamously referred to by fans and dieters as

First, it is crucial to correct a misconception. There is no official "Karl Lagerfeld Diet" book written by the Kaiser himself. The PDF that circulates online is derived from the work of Dr. Jean-Claude Houdret, a French physician who helped Lagerfeld lose the weight.

The plan prioritized fish, white meat, and plant-based proteins.