Anabolic steroids are synthetic male hormones that help athletes to grow larger muscles and become stronger. A study from the University of Texas shows that anabolic steroids may not be as dangerous as many physicians believe. (1).
Your liver is loaded with chemicals called enzymes. When your liver is damaged, it releases these enzymes into your bloodstream, so doctors measure liver damage by measuring blood levels of enzymes. However, many of these enzymes are also found in muscle cells and lifting heavy weights damages muscles, causing these same enzymes to accumulate in the bloodstream. An enzyme called GGTP is found in liver but not muscle cells, and many of the people who were reported to have liver damage did not have elevated levels of GGTP, showing that there was muscle damage from lifting weights and no liver damage. So many reports of liver damage with anabolic steroids are incorrect because the abnormal liver testes were caused by lifting weights and not by a damaged liver.
Anabolic steroids are still not safe, because many athletes take massive overdoses which will damage the liver. They can also damage heart muscle (2), enlarge the prostate (3) and cause infertility (4).
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