Confidence votes 5. Prefix: im-. 1  Not (il- is used before an l, im- before a b, m or p, ir- before an r) - in-, il-, ir-, un-.  In, into, towards, within (il- is used before an l, im- before a b, m or p, ir- before an r) - in-, il-, ir-.
Anabolic steroids are synthetic substances similar to the male hormone testosterone. Doctors prescribe them to treat problems such as delayed puberty and other medical problems that cause the body to make very low amounts of testosterone.Steroids make muscles bigger and bones stronger.ome people take legal dietary supplements that have certain steroid hormones also made by the human body. One such supplement is dehydroepiandrosterone (DHEA). The body can turn DHEA into other steroid hormones, including testosterone, estrogen, and cortisol. People use it to try to make their muscles bigger.
Designer steroids. A particularly dangerous class of anabolic steroids are the so-called designer drugs â synthetic steroids that have been illicitly created to be undetectable by current drug tests. They are made specifically for athletes and have no approved medical use.ome athletes take a form of steroids â known as anabolic-androgen steroids or just anabolic steroids â to increase their muscle mass and strength. The main anabolic steroid hormone produced by your body is testosterone. Testosterone has two main effects on your body: 1  Anabolic effects promote muscle building.