LGD-3303 is a drug used as a selective androgen receptor modulator with good oral bioavailability. It is a selective agonist of androgen receptor, producing functionally selective and effective decomposition and synthesis and androgen action, as a partial agonist of androgen action, but full agonist anabolic effects. A possible treatment for osteoporosis has been studied, and the effect of enhanced bisphosphonate drugs has been shown in animal studies.