Medical Note: This diet must be supervised by a physician. Dr. Houdret regularly checked Lagerfeld’s blood work. Do not attempt Phase 1 without monitoring.

Breakfast

Lunch

Dinner

Snacks (if needed)

A unique and controversial aspect of the Lagerfeld diet is the heavy reliance on nutritional supplements. The book promotes the "3D" supplements (sold alongside the diet), which include:

Lagerfeld argued that these supplements were necessary to prevent the skin from sagging during rapid weight loss and to maintain energy levels despite the low caloric intake.

If you skim a The Karl Lagerfeld Diet.pdf, you will notice one recurring hero ingredient: steamed white fish (cod, sole, or sea bass).

Lagerfeld believed that red meat was "too heavy," but white fish provided perfect protein without fat. Dr. Houdret argued that white fish has a "drying" effect on the body—eliminating water retention and creating a lean, almost gaunt silhouette.

Lagerfeld’s motivation was rooted in vanity and fashion. He famously stated that he wanted to fit into the slim-cut suits designed by Hedi Slimane for Dior Homme.

The central tenet of the diet is that being overweight is a choice, and weight loss is a matter of willpower. Lagerfeld argued that modern society coddles overweight people, and he rejected the concept of "loving yourself as you are." To him, the body was a malleable object that should be sculpted to fit the clothes, not the other way around.