I was just in GNC browsing around for some protein bars to eat during the day as snacks and one of the people there started talking to me about suppliments and their benefits, etc. This got me curious because so many people tell you that they're not really necessary. He mentioned that taking Creatine, ETS, and Nitrean or Opticen would really help me to gain muscle mass over a short period. So I come home and do a search on the forum and found a post containing the same three suppliments, and explained their benefits.
My question, should I even decide to test them, is when and how often do I take which one? The guy at the store gave me a very general answer of "whenever you want to take them" but I'd like a more specific answer. Which one do I take and when? Thanks.