Anabolic and androgenic steroids are available as prescription medications to be used in cases in which the body does not make enough hormone and supplementation may be required. Some hormone supplements in this pathway include growth hormone and testosterone itself. These medications are legally prescribed by health-care providers, but this group of drugs is often used illegally and abused to help increase athletic performance and improve body appearance. When used in a well-nourished body, anabolic steroids will cause weight gain primarily due to an increase in muscle mass.
NOT NECESSARILY TRUE . Faced with an unnatural rise in estrogen, some steroid users will then take a class of drugs called aromatase inhibitors , which are designed to block the production of estrogen in women with breast cancer, Weinerman says. That's right: It's a breast cancer drug. And aside from the obvious danger in further messing with hormones, guys who turn to aromatase inhibitors can have side effects like joint and muscle pain, the loss of sex drive, and the loss of bone density, which can then result in osteoporosis, according to a Susan G. Komen Foundation report .