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Proviron 50 mg Magnus Pharmaceuticals | GAS-0286

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Proviron( Mesterolone), the active substance is mesterolone. Chemical Name: 17b-hydroxy-1a-methyl-5a-androstan-3-oh1-methyl-5a-dihydrotestosterone. A hormonal drug that has moderate androgenic activity and significantly enhances erectile function. It appeared in 1934 and, despite its long life, remains a unique anabolic.

Features and properties of Proviron activity: 8-12 hours (residual effect up to 24 hours); androgenic steroid; androgenic index: 30-40%; anabolic index: 100-150%; does not retain water; low hepatoxicity; does not aromatize; DHT derivative, but is not converted to DHT. The drug has a lower toxicity to the liver, which, in turn, allows you to take proviron in combination with other tableted anabolics during the steroid cycle. Its action is aimed at blocking the conversion of testosterone into estrogens, but its effectiveness in this matter is very low.

Therefore, it is not equated in action to aromatase inhibitors (it will not cope with aromatization on the course). However, proviron can actually reduce the sensitivity of the estrogen receptors, which further increases its effectiveness by weakening the estrogen circulating in the blood. A more significant effect is the suppression of globulin, which binds sex hormones. This increases the effectiveness of the course by increasing the amount of free testosterone in the blood.

This occurs in conditions where testosterone in the human body is inactive by 80-98% due to globulin and albumin, which bind to the sex hormone and prevent the release of testosterone. And the participation of proviron in this ballet leads to the fact that dihydrotestosterone, which has a higher affinity for these proteins than testosterone, joins globulin and albumin, which, in turn, release a large amount of free testosterone, and this leads to better anabolic activity. Reducing the SHBG helps to increase the result from the course.


The drug reduces the side effect of anabolics on the male reproductive system, helps not to lose libido and maintain erectile function. Mesterolone is connected in the case when it is impossible to achieve a reduction in SHBG without resorting to this drug. It is commonly used as part of a range of steroids. As an independent drug, it is not used, since it does not have any special anabolic properties. It is not suitable for building muscle mass. But as a preparatory stage for serious steroids, its use is justified.

At the same time, mesterolone is used on a general course of steroids in order to increase androgenicity (this is good and bad - an individual approach is used). Therefore, proviron is often used with steroids such as nandrolone and trenbolone, which have a low androgenic effect. This combination gives a pleasant and predictable result-an increase in libido. Dihydrotestosterone plays a key role in improving libido, and therefore proviron is used together with such steroids to weaken or reduce the insidious side effect. Proviron in bodybuilding is most often used before competitions. This significantly improves the relief of the muscles.

This positive effect is due to the low level of regulation of estrogenic receptors in the muscle tissue, due to which the body's water balance is reduced, giving a visual effect of dry, high-quality, hard muscles.


For men, the normal dose of the drug is 75-150 mg, for women-25 mg. But usually athletes overestimate the dosage, increasing it to 250 mg and 50 mg, respectively.

Active substance Proviron
Active ingredient, mg 50
Release form Pills
1 pill, mg 50
Manufacturer Magnus Pharmaceuticals
Packing Packing (25 pills)

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