Dr. Max Gerson had a wonderfully simple, and basically true, description of the origin of disease, according to his daughter, Charlotte: disease comes from the absence of nutrients and the presence of toxins. Further, the toxins tend to sit where the nutrients should be. Therefore, said Max, if you flood the body with nutrients you will push out the toxins.

The Gerson Therapy involves eating 20 pounds (10 kilos) of fresh, raw, organic vegetable a day. To eat that quantity you have to juice. In the Gerson Therapy you drink vegetable juice every hour. Also, because the treatment causes the rapid elimination of toxins, which accumulate briefly in the liver and make you feel ghastly, "coffee enemas" are used to flush the liver. (I would advise trying flushing with "liver tonic herbs" rather than coffee: e.g. Burdock.)