Cookbook:Protein
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An essential part of organisms, proteins are made up of amino acids. Some amino acids can be synthesized by the human body while some must be obtained through food. Proteins are major contributors to cells' functions.
Protein is one of the main basic components of food, along with carbohydrates, fat and water. Proteins contain 4 calories per gram, which is the same caloric density as carbohydrates, but less than fat's value of 9 calories per gram.
Sources of protein in the diet include nuts, legumes, grains, eggs, meats and dairy products.
[edit] External Links
See http://www.hsph.harvard.edu/nutritionsource/protein.html
