FAQ: What is the difference between whey protein powder and other types of protein? | Whey Protein Institute's Mary Higgins describes whey protein isolate, whey protein concentrate, and hydrolyzed why protein.
What Whey Proteins are most effective and why. Either "Whey protein isolate" or "Hydrolyzed whey protein isolate" should be the very first ingredient. http://www.muscleandfitness.com/supplements/build-muscle/does-your-whey-protein-powder-suck?page=2#