Well, I am using a cheaper kind , but Hammer nutrition says:


One more point about whey protein: for a supplement, make sure you use whey protein isolate, not whey protein concentrate. Whey protein isolate is virtually lactose and fat free; many lactose-intolerant people can still use whey protein isolate because it contains only a miniscule amount of lactose. Also, whey isolate checks in at a sturdy 90-97% protein by volume, whereas whey concentrate runs only 70-80% protein by weight. Simply put, whey protein isolate is a purer protein, and the best protein you can put into your body after a hard workout, which is why HAMMER WHEY is comprised of whey protein isolates only.


I looked at the ingredients for the unflavored, and it doesn't have any sweeteners!