So this kind of goes off of my thread about working out, which is a few months old, and I've gotten results, better at the gym and such. I was just wondering, what kind of supplements should I use? One of my friends uses supplements such as, Jack3d, Opti-men, Beast Creature, Pro Complex, C4 Extreme, build-HD, GO, etc., and I was wondering if I should start using some of those. I currently just use GNC Whey Protein, but I'd like to see more gain and such. If you could, recommend me some! Also, would it be safe to take different kinds of pre-workouts at the same time? For instance, Jack3d, Opti-men, and then Whey Protein afterwards? Or would it not be safe? Thanks!