For example, the protein in cheese and cottage cheese is casein. Lower in naturally occurring glutamine than milk (casein) proteins, which is why glutamine is added to some formulas.Ĭasein is the predominant protein in milk.Because it digests fast, it won’t keep you satisfied for very long.High in BCAAs (branched chain amino acids), important for bodybuilders and dieters since BCAAs can be used for fuel, potentially sparing muscle tissue.Supports immune health from certain protein components.Digests fast won’t leave you feeling full.Whey is the highest quality protein, better than all other animal proteins.About 20% of the protein in milk is whey and 80% is casein. Protein Differences Whey Protein This protein from milk is a by-product of cheese making.