Anabolic steroid - Definition

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An anabolic steroid is a substance that increases anabolism, meaning the transformation of nutrients into living tissue. It can be used to heighten physical performance. Taking anabolic steroids, either orally or via injection, increases muscle mass, lowers fat mass and aids in recuperation after effort. Anabolic steroids are produced from natural hormones, like testosterone, or man-made, like steroids. Anabolic steroids lead to the development of masculine characteristics and are not without dangers, sometimes fatal.