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November 30, 1907


JAMA. 1907;XLIX(22):1847-1848. doi:10.1001/jama.1907.02530220035005

In view of the well-established fact that the chief source of heat and energy of the animal body, whether active or at rest, is in the carbohydrates and fats, the relatively considerable amount of protein food that is absolutely demanded by the body is a matter of considerable interest. It is also striking that the laying up in the body of proteins is, save in the growing young, accomplished only under exceptionalconditions, and that the body seems to have no such place of storage for proteins as it has for the fats and carbohydrates. The amount of breaking down and building up of tissue cells that we can detect seems to be far too small to account for the amount of protein that is required, and yet so far as we know this is the only purpose for which proteins are indispensable. On the basis of his extensive observations on