Whey protein is the highest BV (Biological Value) protein available in nature. Research has shown that the highest rate of nitrogen retention is achieved with whey protein. USN"s 100% Whey Protein provides the purest form of this single protein substrate. It contains proteins such as lactalbumen and immunoglobulins which are known to be vital for proper immune system function, muscle development and recovery. Now with revolutionary MyoMatrixTM whey protein isolate and concentrate blend and ZymaTechTM digestive enzyme technology, the proper uptake of the whey protein and its conversion into amino acids by your body is greatly improved.