This section is from the book "The Hygienic System: Fasting And Sun Bathing", by Herbert M. Shelton. Also available from Amazon: The Hygienic System Vol III Fasting and Sun Bathing.
One of the most common complaints of the chronic sufferer is this: "I have lost my appetite." Frequently the complaint takes this form: "I eat, but I do not enjoy my food." Another very common complaint of the chronic sufferer is: "Everything I eat turns to gas." Physicians customarily prescribe tonics and digestants under such conditions and urge these patients to "eat plenty of good nourishing food." They prescribe their drugs with the deliberate intention of whipping a jaded appetite into renewed vigor. They foolishly call this curing people of "lost appetite."
When a person is heard to complain that "nothing tastes good," you may be sure that he is in need of a fast. He will usually attempt, by the use of seasonings, condiments, sweetenings, etc., added to his foods, to make them taste good to him, but he also fails in this attempt. Nothing will so surely and so speedily restore the pleasures of eating to these gluttons, as a fast.