Proviron 25 mg by Bayer is a pharmaceutical-grade oral androgen containing mesterolone, available in 20 tablets per box. Mesterolone is a synthetic derivative of dihydrotestosterone (DHT), structurally non-aromatizing and absent of c17-alpha alkylation, contributing to its distinct pharmacological profile in clinical research.

📦 Product Specifications

Manufacturer: Bayer
Form: Oral tablet
Molecule: Mesterolone (DHT derivative)
Concentration: 25 mg per tablet
Volume: 20 tablets per box
Dosage considerations may vary. Consulting a qualified healthcare professional is recommended.

✔ Key Research Insights

Researched for its role in modulating free androgen availability through SHBG binding
Studied for its inhibitory action on the aromatase enzyme, limiting estrogen conversion
Investigated for its effects on lipolysis via androgen receptor binding in muscle and adipose tissue
Researched for its low suppressive impact on LH and FSH in clinical observations

⚙ How It Works

Mesterolone is an orally active DHT derivative that exerts androgenic activity without conversion to estrogen, as it does not interact with the aromatase enzyme. In research subjects, it demonstrates a strong binding affinity to sex hormone-binding globulin (SHBG), which is associated with increased levels of unbound circulating androgens. Due to the absence of c17-alpha alkylation, hepatotoxic impact is considered minimal relative to other oral androgens. Mesterolone does not typically suppress gonadotropin levels, a characteristic that has been noted in studies examining its effect on the hypothalamic-pituitary-testicular axis (HPTA).

⚠ Clinical Considerations

DHT-derived compounds have been associated with androgenic side effects, including accelerated hair follicle sensitivity in predisposed individuals
Not recommended for use in female research subjects due to documented risks of virilization
Anabolic activity as a standalone compound is considered mild in the clinical literature; effects are more pronounced when studied in combination protocols

⭐ Product Overview

Manufactured by Bayer, a globally recognized pharmaceutical company
Consistent tablet formulation with precise mesterolone concentration
Established compound with an extensive clinical and pharmacological research history
High manufacturing standards and pharmaceutical-grade quality assurance

Proviron Bayer 25mg in Thailand

฿1,190.00

฿850.00

Quantity

For bodybuilding purposes, Proviron is typically taken in daily doses of 25-75 mg. Lower doses (25-50 mg) are common for enhancing muscle definition and estrogen control, while higher doses may be used to increase free testosterone levels. It’s generally advised to use Proviron alongside other compounds in a cycle, as it is mild in its anabolic effects. For safety, users often cap cycles at 8-12 weeks and consult a healthcare professional, especially to assess personal tolerance and minimize potential side effects.
Proviron typically starts to exert its effects within the first week of use, but visible results depend on the individual’s goals and stack. Bodybuilders often feel its impact on muscle hardness and free testosterone enhancement relatively quickly due to its binding to SHBG and aromatase enzymes. However, noticeable changes in muscle definition and reduced estrogen-related water retention may take several weeks, especially when used in combination with other steroids in a cycle.