Question: what is the difference between whey soy and casein protein?
Answer: Soy Protein is a plant-based protein originating from the soybean plant. Soy protein is a complete protein, like whey, and is one of the only non-animal based proteins that is “complete”. ... Casein Protein, like whey, is a milk-based protein. It makes up 80% of the protein in cow's milk, making it more abundant that whey.