why do you use whey protein isolate rather than soy protein in mix1 products?

We use premium quality whey protein isolate for its superior digestibility and usability by the body.  Whey protein isolate has the highest biological value of all proteins, which means it’s the most effective protein in terms of absorbability into the body.  It is free of lactose, fat, and cholesterol and is the richest source of the eight essential amino acids and branched chain amino acids for energy and vibrant health.  Other forms of protein, such as soy and blends, have a much lower biological value meaning your body does not digest and utilize the protein as efficiently.  Additionally, many people have trouble digesting soy so whey protein isolate offers an option that suits most diets.