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The New Zealand Railways Magazine, Volume 11, Issue 5 (August 1, 1936)

Proteins

Proteins.

These are the body-builders, differing from the carbohydrates in that they contain nitrogen, and go to build and repair the living cells of the body. They are absolutely essential for life. They are very complex substances, and differ greatly in composition. Some, the animal proteins, contain all the protein elements required by the page 59 body, while others, the vegetable proteins, are not so complete, and in consequence, are not of such good quality as the former. Milk is an excellent animal protein, a pint of which has the equivalent of four ounces of beef in protein content. The best proteins, occur in meat, fish, eggs and cheese and milk. Nuts are high in fat and protein content, but the protein is not of such good quality as that of meat or milk. Some fruits and vegetables have a certain protein content, but so small as to be almost negligible.