- Anabolic steroids are a man-made version of the hormone testosterone, its precursors, or other related compounds.
- Some athletes and weightlifters take them to improve athletic performance and increase muscle mass.
- Some non-athletes take them too, to improve their gains at the gym or just to look better.
- More than 4 million Americans, most of them men, have experience with anabolic steroids.
Anabolic steroids work in the body like testosterone, the main male sex hormone. Some of them are testosterone, some of them are testosterone precursors, and some of them are related compounds that act similarly in the body. (Their street names include Arnolds, gym candy, pumpers, roids, and stackers.) Anabolic steroids are mostly known in pop culture via sports—some athletes and bodybuilders have taken them to build muscle, increase endurance, or improve their athletic ability, although they’re considered an illegal performance-enhancing drug. But some anabolics also have several medical uses and are legal with a doctor’s prescription.
How do anabolic steroids work?
Anabolic steroids can be taken as a pill, injection, implanted pellets, or via a cream or gel.
They
work by binding to androgen (sex hormone) receptors in the brain, just
as natural testosterone does, which influences how specific cells
function and genes are expressed. In particular, they regulate the
pathways that determine male characteristics and activate certain cells
that produce the proteins that build muscle tissue and fibers. This can
increase muscle mass.
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