Gold Standard 100% Whey Blend 24g blended protein consisting of whey protein isolate, whey protein concentrate, and whey peptides/hydrolysates to support muscle recovery and rebuilding. Primary protein source is Whey Protein Isolate (WPI), they don't call it the Gold Standard of quality for nothingWhat Does It Have -11 grams of naturally occurring EAAs, including 5.5 grams of naturally occurring BCAAs, and over 4 grams of naturally occurring Glutamine and Glutamic Acid in each serving to support endurance and muscle recovery. Gluten-Free & suitable for Vegetarians.When To Use First thing in the morning, before or after exercise, between meals, with a meal, or any time of the day, where you a protein boost to your balanced dietBanned Substance Tested- Informed Choice Certified- the product is blindly and regularly tested for presence of banned substances and impurities. Optimum Nutrition is trusted by world's best athletes since 35 years