As mentioned above, mixing three kinds of whey helps making it a complete product. Contrary to popular belief, there is no "better" kind of whey, they each have their own benefits and mixing them all three is a wise choice made by Optimum Nutrition.
One dose provides 24 g protein, 3 g carbohydrates, 1 g sugar and 1 g of fat, which makes it a good choice for people who follow low diets in carbohydrates (such as the ketogenic diet) or Diets low in fat.
The mixture of Aminogen and lactase should improve absorption.