I used to work at Musclemag internation. When I was there, we actually tested some of the brands of whey right off the shelf. We sent them to a lab to be tested. Out of all of the brands we tested, the only one that actually had what it claimed on the label was PRolab. They claim they have 24 grms protein scoop, the test claimed 25.5 grams of protein. Since then, I have not looked back. Prolab all the way.