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Mesterolone, also known by its brand name Proviron, is a synthetic androgenic-anabolic steroid (AAS) that is derived from dihydrotestosterone (DHT). It is primarily used in the treatment of low testosterone levels in men, infertility, and hypogonadism.
Mesterolone works by binding to androgen receptors in the body, which leads to an increase in testosterone levels. It also inhibits the aromatase enzyme, which converts testosterone into estrogen. By reducing estrogen levels, mesterolone can help prevent or alleviate symptoms associated with excess estrogen, such as water retention and gynecomastia (enlarged breast tissue in males).
Additionally, mesterolone has been found to have anti-estrogenic effects, meaning it can block the effects of estrogen in certain tissues. This can be beneficial for athletes and bodybuilders who want to reduce estrogen-related side effects while using other AAS that may increase estrogen levels.
It is important to note that mesterolone is not typically used for muscle building or performance enhancement purposes, as its anabolic effects are relatively weak compared to other AAS. It is primarily prescribed for medical conditions and should only be used under the supervision of a healthcare professional.