Mesterolone (Proviron)

(5 customer reviews)


Proviron® is Schering’s (now Bayer’s) brand name for the oral androgen mesterolone (1-methyl dihydro testosterone). Similar to dihydro testosterone, mesterolone is a strong androgen with only a weak level of anabolic activity.

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Proviron® is Schering’s (now Bayer’s) brand name for the oral androgen mesterolone (1-methyl dihydro testosterone). Similar to dihydro testosterone, mesterolone is a strong androgen with only a weak level of anabolic activity. This is due to the fact that like dihydro testosterone, mesterolone is rapidly reduced to inactive diol metabolites in muscle tissue where concentrations of the 3-hydroxysteroid dehydrogenase enzyme are high. The belief that the weak anabolic nature of this compound indicates a tendency to block the androgen receptor in muscle tissue, thereby reducing the gains of other more potent muscle-building steroids, should likewise not be taken seriously. In fact, due to its extremely high affinity for plasma binding proteins such as SHBG, mesterolone may actually work to potentate the activity of other steroids by displacing a higher percentage into a free, unbound state. Among athletes, mesterolone is primarily used to increase androgen levels when dieting or preparing for a contest, and as an anti-estrogen due to its intrinsic ability to antagonize the aromatase enzyme.

Administration (Men):

To treat androgen insufficiency, mesterolone is usually given in a dose of 1 tablet (25 mg) three times per day at the initiation of therapy. The drug is later continued at a lower maintenance dose, which usually consists of taking 1 tablet (25 mg) one to two times per day. Similar doses are used to support male fertility, usually in conjunction with other fertility drugs like injectable FSH. The usual dosage among male athletes is between 50 mg and 150 mg of mesterolone per day, or two to six 25 mg tablets. The drug is typically taken in cycles of 6-12 weeks in length, which is usually a sufficient period of time to notice the benefits of drug therapy.

Many bodybuilders favor the use of mesterolone during dieting phases or contest preparation, when low estrogen and high androgen levels are particularly desirable. This is especially beneficial when anabolics like Winstrol®, Anavar, or Primobolan® are being used alone, as the androgenic content of these drugs is relatively low. Mesterolone can be effectively used here to adjust the androgen to estrogen ratio upwards, bringing about an increase in the hardness and density of the muscles, supporting libido and general sense of well being, and increasing the tendency to burn body fat. It is also commonly used (at a similar dosage) to prevent gynecomastia when other aromatizable steroids are being administered, often in conjunction with 10-20 mg per day of Nolvadex.

Administration (Women):

Mesterolone is not approved for use in women. This agent is not recommended for women for physique- or performance-enhancing purposes due to its strong androgenic nature and tendency to produce virilizing side effects.

If you wish to purchase this in a stack, along with other components, consider our best seller cycle:



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Additional information


Hilma Biocare, Bayer

5 reviews for Mesterolone (Proviron)

  1. Fred

    Combine this with tadalafil and turn yourself into woodpecker in these lock-down times. Assuming you have a partner worth using it 😉

  2. Derek

    Excellent service, only been taking them for 9 days and I am very pleased with the results so far.
    I give 4 stars because Bayer Proviron is a bit pricey.

  3. Blake

    EXTREME Libido increase.

  4. Alpha

    I am normally very skeptical of these ‘supplementsa. I got this to take while I was training for a weightlift completion , hoping that it would help me to train harder. I believe it did just that. One thing that I can absolutely say it increases is sex drive, maybe too much. If I haven’t taken this is a while, within 24 hours of taking it I notice a huge increase in drive. Great for when I’m with a special lady, a bit annoying when I want to focus on other things and I don’t want to feel like a horny 18 year old.

  5. Schmitt

    Have used Proviron several times and they work great. Have used a number of other sources and research chemical brands and these brand is as good or better than any I’ve tried previously.

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