Published: June 16, 2026
Last Updated: June 16, 2026
Medically Reviewed by: Dr. Richard Holloway, MD — Consultant Endocrinologist, London & New York
Content Review: Pharmacist-verified | AI-assisted content, human-edited for clinical accuracy

Mesterolone 25mg Tablets — Complete Product Overview

Mesterolone 25mg, commonly known by the brand name Proviron, is a synthetic anabolic-androgenic steroid (AAS) derived from dihydrotestosterone (DHT). It is primarily prescribed for men suffering from testosterone deficiency, hypogonadism, and related androgen-deficiency conditions.

What Is Mesterolone 25mg?

Mesterolone is an orally active androgen that does not convert to estrogen (non-aromatizing), making it distinct from many other testosterone-based treatments. It binds strongly to androgen receptors and Sex Hormone Binding Globulin (SHBG), allowing more free testosterone to circulate in the body. Clinically, it has been used for decades in endocrinology and urology for managing male sexual health disorders.

Medical Uses and Indications

• Male Hypogonadism — Restores androgen levels in men whose testes do not produce sufficient testosterone
• Infertility in Men — Used to improve sperm count and motility in oligospermia cases
• Androgen Deficiency — Addresses symptoms such as low libido, fatigue, depression, and reduced muscle mass
• Erectile Dysfunction — As part of hormonal management in testosterone-deficient men
• Delayed Puberty — In adolescent males under strict medical supervision

How Mesterolone Works

Mesterolone exerts its effects by binding to androgen receptors in target tissues including muscle, prostate, and libido centers. It inhibits SHBG, freeing up bound testosterone for biological activity. Its non-aromatizing nature means it does not convert to estrogen, reducing water retention and gynecomastia risk. Its DHT-like activity supports male characteristics and libido without estrogenic side effects.

Dosage and Administration

Always follow your licensed healthcare provider’s prescription. Do not self-medicate.

Composition

Key Benefits

• Non-estrogenic — no water retention or gynecomastia risk
• Improves free testosterone levels
• Supports male libido and sexual function
• Enhances sperm production and quality
• Oral administration — no injections required
• Pharmaceutical-grade, quality-tested formulation

Side Effects and Precautions

Possible side effects include acne or oily skin, increased body or facial hair, mood changes, prostate enlargement with prolonged use, and minimal liver stress compared to other oral steroids.

Contraindications include use in women (especially pregnant or breastfeeding), individuals with prostate cancer or liver disease, hypersensitivity to Mesterolone or any excipient, and men with pre-existing cardiovascular conditions who have not consulted a physician.

Delivery Information

USA: Discreet standard and express shipping available nationwide.
UK: Royal Mail tracked delivery with express options available.
Packaging: Plain, unmarked packaging for complete privacy.
Dispatch: Orders processed within 24 to 48 hours.

Quality Assurance

All products are manufactured in GMP-certified facilities, third-party tested for potency and purity, stored under pharmaceutical-grade conditions, and compliant with international quality standards.

Frequently Asked Questions

Is Mesterolone the same as Proviron?
Yes. Proviron is the original brand name for Mesterolone 25mg, manufactured by Bayer. Generic versions contain the identical active ingredient.

Do I need a prescription?
In the USA and UK, Mesterolone is a prescription-controlled substance. We recommend consulting a licensed physician before purchase.

How quickly does it work?
Most users report improvement in energy and libido within 2 to 4 weeks of consistent use under medical guidance.

Can women use Mesterolone?
No. Mesterolone is contraindicated in women due to its strong androgenic activity.