3) Protein source
1. Cow’s milk protein is the most important protein source
① Produced from isolated casein or from whey protein concentrate
② Outstanding nutritional value, amino acid composition,
commercial availability in large
2. Plant proteins are finding commercial application
① Soybean is the source most widely used in special nutritional
formulations
② Legumes such as peas and chickpeas are becoming increasingly
important
③ Underutilized by-products of the oil industry extraction such as
sunflower and rapeseed
3. The main drawback of plant protein hydrolysates : low level of
some essential amino acids (sulphur-containing amino acids)