What is the difference between whey protein isolate, concentrate, and hydrolysate?

Whey is naturally found in cow’s milk, meaning it contains carbs, fats, and protein. Whey protein concentrate is about 70–80% protein and contains some lactose and fat. Whey protein isolates have removed more of the lactose and fat with at least 90% protein. Whey protein hydrolysate powder goes through additional processing, breaking the proteins down into shorter amino acid strands.