Amplified Maxertion N.O? I've been using GNC Pro Performance® AMP Amplified Maxertion N.O.™ for awhile now and I've ran out of supply. I live in Japan and have been meaning to order some more supplies online but haven't got around to it for 2 weeks now, will this have any negative effects on my health that I don't know off etc? Also is it alright to take Whey protein with this product?