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Anabolic steroids are synthetic derivatives of testosterone, the male sex hormone. They were in the 2nd World War and were originally developed to allow weakened and malnourished prisoners of war better recovery. They were also used for their protein anabolic effect of the disease of consumption and muscle atrophy and as a remedy for anemia. Very soon, they also found application in sports where they were administered as an illegal drug to improve performance in healthy athletes. In medicine, anabolic steroids are still in a failure of the testes (lack of own body education testosterone), growth in the event of failure or physical weakness (eg the elderly) use. They usually belong to the group of anabolic steroids.

Steroids (derived from the name of the first known steroids, cholesterol) and "like" suffix oeides) are a class of lipids (molecules with lipophilic groups generally insoluble in water). Steroids are derivatives of sterane hydrocarbons (cyclopentanoperhydrophenanthrene). Natural steroids are found in animals, plants and fungi, and many are synthesized in the smooth endoplasmic reticulum. Their biochemical functions ranging from vitamins and sex hormones (androgens and estrogens in men in women) on bile acid and toad poison for heart-active toxins of digitalis and oleander.

In animals and humans is the main steroid is cholesterol; plants contain it are not. Lipoprotein cholesterol and steroid hormones constituted such as adrenal cortical hormones (corticosteroids). Artificial derivatives of testosterone, the male sex hormone, anabolic steroids are used as bodybuilding products. This is a public interest in sports known as doping agents.