while the Isopure is, as the name suggests, a whey protein isolate, and thus may be a better pick for those who are sensitive to lactose. You can also buy the Isopure bundled with the brand's ...

There are two types of whey protein — whey-protein isolate and whey-protein concentrate — and the experts say the best kind is whey-protein isolate, because it is strained in a way that gives ...