LGD-4033, also known as Ligandrol, is a compound that selectively targets androgen receptors. It is often used as a legal alternative to steroids by professional athletes and bodybuilders due to its purported anabolic effects and supposed lack of androgenic side effects (compared to steroids).
Having a high affinity towards AR (androgen receptors), LGD-4033 selectively binds to the androgen receptors in the muscles. It has a lower affinity for binding to other locations where androgen receptors are present in the body. Ligandrol carries an anabolic vs. androgenic ratio of 10:1.