Protein efficiency ratio (PER) is based on the weight gain of a test subject divided by its intake of a particular food
protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...
during the test period.
From 1919 until very recently, the PER had been a widely used method for evaluating the quality of protein in food.
The food industry in Canada currently uses the PER as the standard for evaluating the protein quality of foods. The official method for determining the protein efficiency ratio is from Health Canada's Health Protection Branch Method FO-1, October 15, 1981.
The U.S.
Food and Drug Administration
The United States Food and Drug Administration (FDA or US FDA) is a List of United States federal agencies, federal agency of the United States Department of Health and Human Services, Department of Health and Human Services. The FDA is respon ...
now uses the
Protein Digestibility Corrected Amino Acid Score Protein digestibility-corrected amino acid score (PDCAAS) is a method of evaluating the quality of a protein based on both the amino acid requirements of humans and their ability to digest it.
The PDCAAS rating was adopted by the US FDA and the Fo ...
(PDCAAS) as the basis for the percent of the U.S.
recommended daily allowance
The Dietary Reference Intake (DRI) is a system of nutrition recommendations from the National Academy of Medicine (NAM) of the National Academies (United States). It was introduced in 1997 in order to broaden the existing guidelines known as Reco ...
(USRDA) for protein shown on food labels. However, the PER is still used in certain FDA regulations. The US FDA official methods to calculate the PER are as stated in the Official Methods of Analysis of AOAC International, 16th ed. (1995) Section 45.3.05, AOAC Official Method 982.30 Protein Efficiency Ratio Calculation Method; and Official Methods of Analysis of AOAC International, 18th ed. (2005).
[21 C.F.R. ยง106.160]
See also
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Protein (nutrient)
Proteins are essential nutrients for the human body. They are one of the building blocks of body tissue and can also serve as a fuel source. As a fuel, proteins provide as much energy density as carbohydrates: 4 kcal (17 kJ) per gram; in con ...
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Protein Digestibility Corrected Amino Acid Score Protein digestibility-corrected amino acid score (PDCAAS) is a method of evaluating the quality of a protein based on both the amino acid requirements of humans and their ability to digest it.
The PDCAAS rating was adopted by the US FDA and the Fo ...
(PDCAAS)
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Net protein utilization The net protein utilization, or NPU, is the ratio of amino acid mass converted to proteins to the mass of amino acids supplied. This figure is somewhat affected by the salvage of essential amino acids within the body, but is profoundly affected by t ...
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Nitrogen balance
Nitrogen balance is a measure of nitrogen input minus nitrogen output.
Nitrogen Balance = Nitrogen intake - Nitrogen loss
Sources of nitrogen intake include meat, fish, dairy foods, eggs, nuts and legumes, and grains and cereals. Examples of nitr ...
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Biological value
References
{{DEFAULTSORT:Protein Efficiency Ratio
Proteins
Nutrition