Discover the best protein powders ranked by quality, taste, and value—from Costco’s Kirkland to Optimum Nutrition’s Gold ...

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 ...

whey isolate, or hydrolyzed whey. Whey concentrate is the least processed form of whey protein, and therefore, contains the most dairy. Whey isolate is processed to remove most of the dairy ...