Net protein utilization: Difference between revisions

Revision as of 06:17, 13 August 2023

Revision as of 11:26, 13 October 2024

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The '''net protein utilization''', or ('''NPU''',) is the percentage of ingested [[nitrogen]] that is retained in the body.

==Rating==
It is used to determine the nutritional efficiency of protein in the diet,<ref name=EFSA2012>{{cite journal |title=Scientific Opinion on Dietary Reference Values for protein: Dietary Reference Values for protein |journal=EFSA Journal |date=February 2012 |volume=10 |issue=2 |pages=2557 |doi=10.2903/j.efsa.2012.2557|s2cid=139100064 |hdl=2434/257730 |hdl-access=free }}</ref>{{rp|p=11}} that is, it is used as a measure of "protein quality" for human nutritional purposes.<ref>[https://labdoor.com/article/protein-quality-the-4-most-important-metrics Protein Quality–The 4 Most Important Metrics]</ref>

As a value, NPU can range from 0 to 1 (or 100), with a value of 1 (or 100) indicating 100% utilization of dietary nitrogen as protein and a value of 0 an indication that none of the nitrogen supplied was converted to protein.

Certain foodstuffs, such as [[Eggegg (food)|egg]]s or [[milk]], rate as 1 on an NPU chart.

Experimentally, this value can be determined by determining [[diet (nutrition)|diet]]ary protein intake and then measuring [[nitrogen]] [[excretion]]. One formula for apparent NPU is:<ref>{{cite journal |last1=Blackburn |first1=GL |last2=Bistrian |first2=BR |last3=Maini |first3=BS |last4=Schlamm |first4=HT |last5=Smith |first5=MF |title=Nutritional and metabolic assessment of the hospitalized patient |journal=Journal of Parenteral and Enteral Nutrition |date=1977 |volume=1 |issue=1 |pages=11–22 |doi=10.1177/014860717700100101 |pmid=98649}}</ref>

:NPU = {0.16 × (24 hour protein intake in grams)} - {(24 hour urinary [[urea]] nitrogen) + 2} - {0.1 × ([[ideal body weight]] in kilograms)} / {0.16 × (24 hour protein intake in grams)}

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==References==

{{reflist}}

[[Category:Amino acids]]