Make sure you don't buy one that has a craptonne of sugar in it.
I'm not absolutely sure if you can buy pure whey protein, but if you can, get that.
Always read the label!
:>
I won't be 18, but i don't drink either... so the age thing doesn't affect me as much?
Either way i'm still clueless as to what i'll be doing... seems that getting smashed is a hooge part of it ;)