Whey protein concentrate is what is used in LA Whey and most other LA Muscle products that contain superior protein.
Traditionally LA Muscle have stayed away from protein isolates as they can get denatured if over-processed.
At the end of the day there are hundreds of whey protein brands and blends out there. It is taste, mixing and RESULTS that count. LA Muscle proteins are what most professionals use because they provide the very best results without compromising quality or using artificial additives.