Ok. i bought for my first time Mega Whey from GNC for my arms to get way bigger. and im not sure if it will help with anything except to make me wanna vomit from the taste. Now since taking it twice a day will only make it last a week, is there anything else i should buy from GNC next weekend that will help better than that to help my arms bulk way up. Would creatine be a better purchase next time?