Whey protein isolates are the purest form of whey and the main ingredient in Gold Standard 100% Whey™. Each serving provides 24 grams of rapidly digesting whey protein with low levels of fat, cholesterol, lactose and other stuff you can do without making Gold Standard 100% Whey™ the standard all other proteins are measured against. The WPI utilization is costly however it is the best protein to utilize. Highest quality level 100% Whey contains WPI as an essential fixing. In this way giving 24 grams of protein in each serving to bolster post-training muscle building.