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 Anabolic steroids, also known as anabolic-androgenic steroids or AAS, are a class of steroid hormones related to the hormone testosterone. They increase protein synthesis within cells, which results in the buildup of cellular tissue (anabolism), especially in muscles. Anabolic steroids also have androgenic and virilizing properties, including the development and maintenance of masculine characteristics such as the growth of the vocal chords and body hair. The word anabolic comes from the Greek: anabole, "to build up", and the word androgenic comes from the Greek: andros, "man" + genein, "to produce". Anabolic steroids were first isolated, identified and synthesized in the 1930s, and are now used therapeutically in medicine to stimulate bone growth and appetite, induce male puberty, and treat chronic wasting conditions, such as cancer and AIDS. Anabolic steroids also produce increases in muscle mass and physical strength, and are consequently used in sport and bodybuilding to enhance strength or physique. Serious health risks can be produced by long-term use or excessive doses of anabolic steroids. These effects include harmful changes in cholesterol levels (increased bad cholesterol and decreased good cholesterol), acne, high blood pressure, liver damage, and dangerous changes in the structure of the left ventricle of the heart. Some of these effects can be mitigated by exercise, or by taking supplemental drugs. The non-medical use of anabolic steroids is controversial because of their adverse effects and their use to gain potential advantage in competitive sports. The use of anabolic steroids is banned by all major sporting bodies, including the International Olympic Committee, FIFA, UEFA, the National Hockey League, Major League Baseball, the National Basketball Association, the European Athletic Association and the National Football League. Anabolic steroids are controlled substances in many countries, including the United States (U.S.), Canada, the United Kingdom (UK), Australia, Argentina and Brazil, while in other countries, such as Mexico and Thailand, they are freely available. In countries where the drugs are controlled, there is often a black market in which smuggled or counterfeit drugs are sold to users. The quality of such illegal drugs may be low, and contaminants may cause additional health risks. In countries where Anabolic Steroids are strictly regulated, some have called for less regulations.
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