I was at GNC the other day and im looking at there vitamin supps and they are mainly in the 15-20 dollar range. Vitamin E 1000IU 18.99 for 120 caps... sounds decent. But today I was at my local military exchange and they have all the same vitamins and doses... for like 75% off the price... but its not GNC its a no name brand. 50caps of 1000IU Vitamin E is 1.99 there. So i bought em. They look jsut like GNC vitamin e... so my question is... is a vitamin a vitamin a vitamin? Or does it really matter on the company?