Provibol – a hormonal drug, the active ingredient of which is Mesterolone, is able to strengthen the functions of erection and cause a slight androgenic activity. Bodybuilders use Provibol during the course of anabolic steroids – it helps to solve a wide variety of tasks. Provibol does not give steroids in the body to convert into estrogens, being an aromatase inhibitor. Provibol does not allow the development of gynecomastia, does not allow edema, fat deposits and estrogen side effects. Absolutely does not interfere with the body to produce its own testosterone propionate for sale (in increased doses can inhibit the production), but on the contrary, it helps increase the concentration of free testosterone in the blood, blocking the activity of the sex hormone binding globulin. Very often, the drug Provibol is used during post-course therapy, although the feasibility of this action is questionable, since this drug has absolutely no ability to restore the secretion of endogenous testosterone.