Whey protein isolate is considered to be the most nutritionally complete protein available to athletes and body builders its easily absorbed for rapid conversion to muscle tissue it is also low fat low lactose and low in calories it has a high biological value which means more of the protein is retained by the body to be converted to muscle nutrisports whey protein isolate is no less than 84 protein and has added l glutamine for more efficient recovery of muscle tissue it undergoes no he