Anabolic steroid

An anabolic steroid is a synthetic steroid hormone that resembles testosterone in promoting the growth of muscle. Such hormones are used medicinally to treat some forms of weight loss and (illegally) by some athletes and others to enhance physical performance.

Empath: The Luckiest Smurf stories
Some magical forms of anabolic steroids exist within the EMPATH: The Luckiest Smurf story series, such as the cream Hefty created with the help of The Great Book Of Answers to boost his own strength for a short time, although afterward it left him weak and requiring crutches to get around.