Six Star Whey Isolate Plus protein powder features a protein source with one of the highest Biological Values that is easy to digest, mix and absorb. The whey protein isolate has undergone microfiltration to remove the things you donât want and retain higher concentrations of the things your body needs, like pure amino acids. This whey protein isolate powder is loaded with fast-absorbing BCAAs, glutamine and micro-filtered whey protein to help you recover from your workouts.