Hey guys, quick question:
(and I know that I should already know the answer to this, but for some reason, I felt unsure)

I noticed in my local grocery store, (they have a bulk health food section) that they had a bag of "Whey Protein Concentrate", it was just a plain offwhite powder. It was cheap as hell. Is this EXACTLY the same stuff in my protein products? Or does this stuff have other changes made to it before it's used? I don't want to buy it and find out that only 1% of it is protein my body can use. I realize it's not an isolate, and it probably won't mix all that damn easy, but hell, it's about 1/10th the price I'm paying right now.

Also, it doesn't say how many grams of protein are in a certain amount, so am I being naive? Is it 30 grams of protein per 30 gram serving?

Any help?