Dr. Hellmut Lützner (1928–2020) was a renowned physician and expert in therapeutic fasting, which became the focal point of his lifelong work. He initially worked at the renowned private Buchinger Clinic, and when a clinic specializing in nutrition-related illnesses was established in Überlingen by Lake Constance in 1975, he became its chief physician. The book "Fasting – Restart for Body and Mind" (Wie neugeboren durch Fasten) was created in 1976 as a complement to a successful television program and became an absolute bestseller. In 1984, it was followed by the recipe book "Eating Right after Fasting" (Richtig essen nach dem Fasten). Both books have been considered fundamental works for decades. Hellmut Lützner founded the German Academy of Fasting, which aims to train fasting instructors and provide general guidance on how to live simply and healthily.