This section is from the book "The Hygienic System: Orthotrophy", by Herbert M. Shelton. Also available from Amazon: Orthotrophy.
Canned foods usually contain industrial poisons, preservatives, artificial flavorings, colorings, etc., and are often produced from inferior foods. Due to long storage they undergo much deterioration and are especially lacking in protective qualities. Some of them, especially fruits, are put up in sugar (white sugar), and others contain salt, vinegar, spices and various condiments. They are commonly overcooked.
Meats (fish and chicken are also meats), eggs, milk and milk products form no normal part of man's natural diet. They are certainly not essential to the highest degree of physical and mental strength and efficiency. Heavy physiological and biological penalties are exacted for continued violation of legitimacies of nutrition.
Eggs and flesh have a tendency to putrefy in the intestine. Flesh is a fruitful source of parasitic contamination. Alimentary allergy is almost wholly a reaction against foods of animal origin.
 
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