SARM LGD, also known as LGD-4033, is a type of selective androgen receptor modulator that is popular among bodybuilders and athletes for its potential to increase muscle mass and strength. It works by selectively binding to androgen receptors in the body, which may lead to increased protein synthesis and muscle growth. SARM LGD is considered to be a safer alternative to traditional anabolic steroids, as it has fewer side effects associated with its use.