i have a friend who has it (very bad actually) and he cant absorb vitamin B and some other stuff.
i just get whey protein. nothing added to it. i take no other supplements aside from a daily multivitamin. i used to take liquid vitamins, but i no longer have that job and had to cut a few things from my budget...and those are expensive. basically a dollar a day... well worth it however.
i buy my protein online, i forget the website. american wholesalers or something, a very generic sounding name... you can find it if you look, or find another site similar. its very cheap when you buy in bulk. a 3 lb thing at GNC is like 40-50 bucks i think depending what brand you get, and the thing i bought was 12 lbs and was like 64.99 plus shipping and it ended up bein around 70 or so.