Arnold Ehret

Arnold Ehret (July 29, 1866 – October 10, 1922) was a German naturopath and alternative health educator, best known for developing the Mucusless Diet Healing System. Ehret authored books and articles on dieting, detoxification, fruitarianism, fasting, food combining, health, longevity, naturopathy, physical culture and vitalism.
In opposition to medical science that asserts white blood cells are important components of the immune system, Ehret believed that white blood cells are caused by consuming mucus-forming foods, and as waste materials, poison the blood. His ideas about diet and disease have no scientific basis and have been criticized by medical experts as dangerous.