Every bodybuilder's list of favorite supplements for mass includes the usual suspects: creatine, whey protein, arginine, glutamine and branched-chain amino acids (BCAAs). If you're more supplement savvy, your list may also include carnitine, beta-ecdysterone, tribulus terrestris and carnosine. But have you ever considered the B vitamin folate, which is important for fetal development in pregnant women? What about melatonin, the supplement that has helped millions of people sleep better? On the surface, these products don't seem to offer much in the mass-building department. Yet upon further investigation, you'd be surprised to learn how they can help you get closer to your muscle-building goals. Read on to learn about 10 supplements you should take that you probably never even thought could help you build muscle.