The various elements found in food are the following: Starch, sugar, fats, albumen, mineral substances, indigestible substances.
1892, Ella Eaton Kellogg, “Foods”, in Science in the Kitchen: A Scientific Treatise on Food Substances and Their Dietetic Properties, Together with a Practical Explanation of the Principles of Healthful Cookery, and a Large Number of Original, Palatable, and Wholesome Recipes, Revised edition, Michigan: Health Publishing Company, page 25