[BlueSky]

Read what it says on the packaging. You get whey protein isolate and whey protein concentrate products. The isolate products are more pure (usually 90% protein) and have had almost all the fat, cholesterol and lactose removed. The concentrate products are cheaper and less pure (about 80% protein). They are also made using cheaper heat intensive processes that denture the protein, making it less bio-available. You should get better results from the isolate products. As usual, you get what you pay for in this game .