Levothyroxine sodium, by Uni-Pharma.
Cytomel is not an anabolic/androgenic steroid but a thyroid hormone. Cytomel causes a faster conversion of carbohydrates, proteins and fats. Bodybuilders, of course, are especially interested in an increased lipolysis, which means increased fat burning. Competing bodybuilders, in particular, use Cytomel during the weeks before a championship since it helps to maintain an extremely low fat content, without necessitating a hunger diet.