Mesterolone by Zhengzhou Pharmaceutical (ZPHC) – Proviron for Hormonal Balance and Muscle Hardness

Brand: Zhengzhou Pharmaceutical (ZPHC)

Substance: Mesterolone

Action of the Drug

Mesterolone, commonly known as Proviron, is a DHT-derived oral androgen that enhances free testosterone levels by binding to sex hormone-binding globulin (SHBG). It improves muscle density, libido, and overall hormonal balance without converting to estrogen or causing water retention.

Use in Sports

In bodybuilding, Mesterolone is used to enhance the effectiveness of other anabolic steroids by increasing their bioavailability. It's a favorite during cutting cycles for its ability to add muscle hardness, improve definition, and maintain libido when natural testosterone drops.

Withdrawal Period

Mesterolone has a relatively short half-life of 12–13 hours. Full clearance from the body typically occurs within 2–3 days after discontinuation. Detection time in doping tests can be up to 2 weeks depending on the test sensitivity.

Suppression of Natural Testosterone Production

Minimal. Mesterolone does not significantly suppress natural testosterone at moderate doses, which makes it a safe option to support androgen levels during or after a steroid cycle.

Supportive Drugs During and After Use

During use: Usually none required. Mesterolone itself supports androgen levels and reduces estrogenic effects.

After use: Can be used as part of PCT along with Clomid or Nolvadex to enhance libido and restore natural testosterone balance.

Combinations with Other Drugs

• Testosterone (Enanthate, Cypionate, Propionate): Helps reduce estrogenic side effects and boost free testosterone
• Trenbolone: Enhances androgenic drive and hardening during cutting
• Masteron: Double up for a dry, defined physique pre-contest
• Winstrol, Anavar: Ideal for advanced cutting stacks for muscle quality and density
• Dianabol, Anadrol: Used to offset estrogen-related issues and maintain libido

Possible Side Effects and How to Avoid Them

Mild side effects may include increased aggression, hair thinning, or acne due to its DHT nature. To minimize risks, avoid use if prone to androgenic sensitivity, and keep dosages moderate (25–50 mg daily).

Trainer's Recommendation

We often recommend Mesterolone for both beginners and advanced athletes who want to control estrogenic effects, increase muscle hardness, or maintain libido on cycle. It's one of the safest oral androgens with a reliable profile, especially during a cutting phase or PCT. Our team finds it incredibly effective for boosting the overall feel-good factor during intense training blocks.

Comparison with Other Drugs

Unlike Dianabol or Anadrol, Mesterolone does not build mass directly but improves the quality of a cycle. Compared to Arimidex or Aromasin, it doesn't suppress estrogen production but controls estrogen's activity. It's often favored for its mildness and non-toxic nature versus harsher orals.

Main Properties

• Drying/Fat Loss: Moderate – improves muscle definition and hardness without water retention
• Mass/Strength Growth: Low – does not promote direct mass gain but enhances the effects of other AAS

Mesterolone by ZPHC is a versatile and reliable tool for optimizing your cycle. Whether used to control estrogen, support libido, or refine your physique, it's a smart addition to any serious athlete's protocol—just use it right and respect its role in your stack.