Androgenic Effects: Mesterolone has mild androgenic properties, which may contribute to increased muscle hardness and a more defined appearance. It may help reduce water retention and promote a leaner physique.

Estrogen Control: Mesterolone has the ability to bind to estrogen receptors, although it does not aromatize (convert) into estrogen. By occupying estrogen receptors, it may prevent the binding of estrogen and help mitigate estrogen-related side effects such as water retention and gynecomastia.