Bieler (April 2, 1893 – October 11, 1975) was an American physician, best known for his book Food is Your Best Medicine, which advocated the treatment of disease with foods.
He is widely recognized as a pioneer in alternative medicine who used non-pharmaceutical, diet-based therapies to treat his patients.
Bieler opposed the use of any drugs, including aspirin.Bieler rejected the germ theory of disease and his ideas were rejected by medical experts as quackery.