Therefore, if any food combination or diet is to be "normal" or "natural," it must approach in its chemical composition the chemical composition of milk or of red, arterial blood. This furnishes a strictly scientific basis for an exact science of dietetics, and proves true not only in the chemical aspect of the diet problem, but also in every other aspect and in its practical application. The "regular" school of medicine pays little or no attention to rational food regulation. In fact, it knows nothing about it, because "natural dietetics" are as yet not taught in medical schools. As a result of this condition, the dietary advice given by the majority of Old School practitioners is something as follows: "Eat what agrees with you: plenty of good, nourishing food. There is nothing in dietetic fads. What is one man's meat is another man's poison, etc." However, if we study dietetics from a strictly scientific point of view, we find that certain foods--among these especially the highly valued flesh foods, eggs, pulses and cereals--create in the system large quantities of morbid, poisonous substances, while on the other hand fruits and vegetables, which are rich in the organic salts, tend to neutralize and to eliminate from the system the waste materials and poisons created in the processes of protein and starch digestion. The accumulations of waste and systemic poisons are the cause of the majority of diseases arising within the human organism. Therefore it is imperative that the neutralizing and eliminating food elements be provided in sufficient quantities. On this turns the entire problem of natural dietetics. While the "Old School" of medicine looks upon starches, sugars, fats and proteins as the only elements of nutrition worthy of consideration, Nature Cure aims to reduce these foods in the natural dietary and to increase the purifying and eliminating fruits and vegetables. In this volume we cannot go into the details of the diet question. They will be treated in full in our ~Vegetarian Cookbook~ and in our volume on ~Natural Dietetics.~ We shall say here in a general way that in the treatment of chronic diseases, with few exceptions, we favor a strict vegetarian diet for the reason that most chronic diseases are created, as before stated, by the accumulation of the "feces of the cells" in the system. Every piece of animal flesh is saturated with these excrements of the cells in the form of uric acid and many other kinds of acids, alkaloids of putrefaction, xanthines, ptomaines, etc. The organism of the meat eater must dispose not only of its own impurities produced in the processes of digestion and of cell metabolism, but also of the morbid substances that are already contained in the animal flesh.