The ON (Optimum Nutrition) Gold Standard 100% Whey Protein is a high-quality protein containing whey protein isolate. Whey protein isolate is the purest form of whey protein available. Containing premium ultra-filtered whey protein concentrate, it provides high amount of protein in every serving, helping you build muscles fast and recover better after heavy workouts. This protein supplement contains naturally-favoured whey, which provides you proper nourishment and helps in exercise recovery. Consuming this supplement provides you with naturally-occurring glutamine & glutamic acid per serving. This helps you cope with the stress after heavy workout session. You also get a high amount of naturally-occurring BCAAs (Leucine, Isoleucine and Valine) per serving.