Description of the drug

Proviron – a hormonal drug with low androgenic activity. Proviron is used in bodybuilding during a course of anabolic steroids for various purposes.

Well-known manufacturers of Proviron include various divisions of Schering (25 mg tablets), the Moldovan company Balkan Pharmaceuticals (50 mg tablets) and several others.

Available in tablet form, preferably 25 mg. It is an aromatase inhibitor, that is, it prevents the conversion of steroids to estrogen in the body. Proviron prevents gynecomastia, water retention, female fat deposition and other estrogen side effects.

Description of the drug

Proviron in the world of bodybuilding

First use

The first type of use is the result of its structure. The reduced formula of mesterolone (5-alpha) cannot be converted to estrogen. However, it has a higher affinity for the aromatase enzyme (which converts testosterone to estrogen) than testosterone. This means that when used with testosterone or another aromatase compound it prevents the spread of estrogen because it binds tightly to the aromatase enzyme, preventing the conversion of these steroids to estrogen. Thus, the use of mesterolone brings great benefits: reduction of estrogenic side effects and water retention observed with other steroids; It also takes a little effort. It can also be suggested that this drug may actually desensitize estrogen receptors, doubling its effectiveness in lowering circulating estrogen levels.

Expanding the potential of testosterone

The second application is based on boosting testosterone capacity. Testosterone in a healthy person is mostly inactive. 97-98% of testosterone binds to sex hormone-binding globulin (SHBG) and albumin, two proteins. In this form testosterone is mostly inactive. But, as with the aromatase enzyme, dihydrotestosterone has a higher affinity for these proteins than testosterone.

Thus, when mesterolone binds to globulin and albumin, a large amount of free testosterone remains to achieve anabolic processes such as protein synthesis. And it helps increase productivity. There is another part of the equation that is inherently ineffective: a tangle of these proteins does not turn into an androgen receptor.

Expanding the potential of testosterone

The third way to apply Mesterolone

Third, mesterolone is added to pre-competition cycles to increase muscle stiffness and volume. Perhaps due to lower levels of circulating estrogen; Probably due to the lowering of estrogen receptors in muscle tissue, the body’s water balance is reduced, giving the user a visual effect of tough, dry, quality muscles. Bodybuilders often use Proviron carelessly, but actors and models also use it over and over again to get themselves in shape on the last day before filming. Like other methylated compounds of dihydrotestosterone, drostanolone, mezerolone are particularly potent in achieving this effect.


Finally, Proviron is used during the hormonal cycle as a low androgen-free nandrolone. Perhaps the abbreviated formula of 5-alpha in this case is different from dihydrotestosterone. Compounds such as trenbolone and nandrolone are known to reduce libido. The logical result is to limit the athlete’s sexuality. DHT plays a key role in this process and is therefore used in conjunction with such steroids to alleviate or reduce this annoying side effect. Also, Proviron doctors often prescribe to people with low testosterone or patients with chronic impotence. It is not considered a potent anabolic product. It will work just as well, if not better, than other anabolic steroids. Less frequent abuse of proviron, so in medical practice is preferred.

Side effects

Mesterolone is preferred by many athletes because it has virtually no side effects in men. In high doses it can cause some symptoms of virilization in women. But due to high levels of inactivation and distribution in the system (albumin, SHBG, 3bHSD (3b hydroxysteroid dehydrogenase), aromatase), many, if not all, simply never reach the androgen receptor, where secondary anabolic effects and effects occur.

Therefore, its security is relative. Doses of 25 to 250 mg per day were administered without side effects. 50 mg per day is usually enough to be effective in each of the four uses listed above. Therefore it is not necessary to increase a dose. And then it’s up to you.

Side effects