There are 4 important metrics to determine the quality of protein. Here is a list of top 8 protein sources with their quality ranking.
|Protein source||Protein efficiency ratio||Biological value||Net protein utilization||Protein Digestibility Corrected Amino Acid Score|
|Whey protein||3.2 ||104||92||1|
|Soy protein||2.2 ||74||61||1|
Protein efficiency ratio (PER)
Protein efficiency ratio is the ratio of body mass gain to the amount of protein consumed in grams. Protein efficiency ratio was one of method used to assess the quality of protein in food.
Biological value (BV)
Biological value is a measurement used to determine the percentage of protein absorbed by the body and how quickly it is absorbed.
Net protein utilization (NPU)
Net protein utilization is similar to biological value. It is the proportion of nitrogen intake that is retained.
Protein Digestibility Corrected Amino Acid Score
Protein Digestibility Corrected Amino Acid Score is a method of evaluating the quality of protein based on the amino acid requirements of humans and their ability to digest it.