Ok, so, there are more than a few aliens on this list, but if extraterrestrial visitors were more committed to building up muscle mass the natural way we wouldn’t have to load this list up with them. Lobo wasn’t all that huge by superhero standards when he first appeared in Omega Men #3 back in 1983, but he has definitely bulked up since then. We could see a world in which a guy gets that big through protein and creatine alone, but given Lobo’s propensity toward illicit substances, we’re guessing he’s been taking some short cuts. Horse steroids most likely.