Protein

[FX4]

Probably a stupid question, but is the only difference between isolate and blend the fat content?? And if so, is it significant enough to warrant paying that much more for isolate?

[beefcake]

Not just fat but lactose and carbs as well. Also increases the amount of protein content by weight. Also the process increase the biovailibilty as well. Hvyphreak says that he feels the difference when it comes to quality of proteins. If you can afford it then go for it, if not then it really isn't that necessary. Optimum nutrition and allthewhey.com use an concentrate / isolate blend.