Applied Nutrition Critical Whey Blend is a new world of whey protein that maximizes muscle building for athletes. It is a high-purity protein. Applied Nutrition Critical Whey Blend has been produced using ultrafiltration technology to be the fastest digesting and absorbing whey protein concentrate – whey protein isolate and whey protein. Hydrolyzed milk. Applied Nutrition Critical Way Blend works on the intensive growth and maintenance of building muscle mass.