2022 Reprint of the 1926 First Edition. Exact facsimile of the original edition and not reproduced with Optical Recognition Software. Ehret viewed the principal cause of disease as arising from a lifetime's accumulation of mucus in the digestive tract. The mucus residing in the body becomes morbid and consists of "undigested, decayed and retained food substances, all of which are in a state of fermentation and putrefaction." (Ehret, 1922, p.5)...