LGD-4033 (Ligandrol) is a selective androgen receptor modulator (SARM), a class of therapeutic compounds designed to mimic the effects of anabolic steroids on muscle and bone while minimizing unwanted androgenic side effects. It is primarily utilized in scientific research for its potential to promote muscle growth, increase strength, and enhance recovery. Studies have explored its therapeutic applications in treating muscle-wasting conditions, such as sarcopenia, cachexia associated with chronic illnesses, and age-related muscle loss. In the fields of performance enhancement and bodybuilding, it is popular among athletes and fitness enthusiasts for improving physical performance and lean body mass. However, LGD-4033 is not approved for human therapeutic use by regulatory bodies like the FDA and is intended strictly for laboratory research purposes. Its use outside of research may pose health risks, including hormonal disruptions, liver toxicity, and suppression of natural testosterone production.