PROVIRON
Active Substance: | Mesterolone |
Active Half-Life: | Approximately 12 hours |
Dosage: | Typically 25-100 mg per day |
Type: | Androgen |
Form: | Tablet |
Concentration: | 50 mg per tablet |
Quantity: | 100 tablets per package |

Key product parameters
What is Mesterolone?
Mesterolone, marketed under the brand name Proviron, is an oral androgen used to treat low testosterone levels and certain types of male infertility. In the bodybuilding community, it is valued for its ability to enhance muscle hardness and improve the effectiveness of other anabolic steroids.
Mechanism of Action
Mesterolone works by binding to androgen receptors, enhancing the effects of testosterone and other anabolic steroids. It does not convert to estrogen, making it useful for reducing estrogen-related side effects and improving muscle definition.
Benefits
- Muscle Hardness
Enhances muscle definition and vascularity, contributing to a more chiseled appearance.
- Estrogen Control
Helps reduce estrogen-related side effects, such as water retention and gynecomastia.
- Increased Free Testosterone
Binds to sex hormone-binding globulin (SHBG), increasing the availability of free testosterone.
- Improved Libido
Supports sexual health and libido, beneficial during and after steroid cycles.
- Synergistic Effects
Enhances the effectiveness of other anabolic steroids when used in combination.
Side Effects
Before using Mesterolone, it's important to be aware of potential side effects:
- Androgenic Effects
May cause acne, hair loss, and increased body hair growth.
- Mood Changes
Can lead to mood swings or increased aggression in some users.
- Prostate Enlargement
Long-term use may affect prostate health, requiring monitoring.
Usage Guidelines
- Dosage
Typically, doses range from 25-100 mg per day, depending on the user's goals and needs.
- Storage
Store at room temperature, between 20°C to 25°C (68°F to 77°F), away from moisture and light.
- Precautions
Not recommended for individuals with prostate issues or those sensitive to androgenic effects.
FAQ
Cycle lengths vary, but it is often used throughout a steroid cycle. Consult one of our specialized agents at Atech for personalized guidance.
It is often stacked with other anabolic steroids to enhance their effects. Consult our specialized agents at Atech to ensure safe and effective combinations.
Take it as soon as you remember, unless it's close to the time for your next dose. Do not double up.