GP Mast 100 by Geneza Pharmaceuticals – The Go-To Cutting Agent

Brand: Geneza Pharmaceuticals

Substance: Drostanolone Propionate

Action of the Drug

GP Mast 100 is based on Drostanolone Propionate, a fast-acting, DHT-derived anabolic steroid known for its strong anti-estrogenic properties and hardening effects. It's a favorite among bodybuilders during the cutting phase for its ability to enhance muscle density, reduce water retention, and support a dry, aesthetic physique.

Use in Sports

Athletes and physique competitors use GP Mast 100 to bring out muscle detail, especially close to contests or photoshoots. It's commonly stacked in cutting cycles for its ability to promote lean mass retention while supporting fat loss, increased hardness, and vascularity.

Period of Drug Withdrawal

Because Drostanolone Propionate is a short ester, it clears the body quickly—usually within 4–5 days after the last injection. PCT should start 3–5 days after the last dose.

Rate of Suppression of Natural Testosterone Production

GP Mast 100 causes mild to moderate suppression of natural testosterone. Although it's less suppressive than stronger compounds, it still requires a proper PCT to ensure full recovery post-cycle.

What Should Be Used During and After Use

During the cycle:

• Testosterone base (such as GP Test Prop or GP Test E) – to avoid low testosterone symptoms
• Liver support if stacked with oral compounds

Post-cycle therapy (PCT):

• Clomid (Clomiphene)
• Nolvadex (Tamoxifen)
• Optional: HCG (Human Chorionic Gonadotropin) before starting PCT to stimulate testicular function

Combinations with Other Anabolic and Androgenic Drugs

• GP Test Propionate – the classic cutting combo
• GP Tren A – for extreme definition and muscle retention
• GP Winstrol – for a dry, shredded look
• GP Anavar – for a mild, effective oral cutting stack
• GP Clenbuterol – to enhance fat loss

Possible Side Effects and How to Avoid Them

Because Drostanolone doesn't aromatize, estrogenic side effects like water retention or gynecomastia are not a concern. However, side effects may include acne, hair loss (if genetically prone), and mild androgenic symptoms. Always monitor cholesterol and liver values, especially if combining with orals. Use hair protection protocols if you're sensitive to DHT-based drugs.

Why We Recommend It

GP Mast 100 is one of the cleanest and most efficient cutting agents for athletes who already have low body fat and want to push definition and muscle density further. Our coaching team recommends it especially for intermediate users looking to dial in their physique without unnecessary water or fat gain. It's a dry compound, easy to control, and ideal for the final 6–8 weeks before a peak event.

Comparison with Other Drugs

Compared to Winstrol, GP Mast 100 provides more muscle hardness and has fewer joint-related issues. Unlike Trenbolone, it doesn't cause harsh side effects like night sweats or aggression, making it more user-friendly. While it's not ideal for bulking, its cosmetic finish is unmatched in cutting cycles.

Main Properties

• Drying – Fat Loss: High. It promotes fat loss indirectly by preserving lean tissue and improving the metabolic profile while delivering a dry, ripped look.
• Growth of Mass-Strength: Moderate. Strength increases are clean and stable, and muscle gains are dense but not watery or puffy.

GP Mast 100 by Geneza Pharmaceuticals is a precision tool for bodybuilders and athletes who need that sharp, dry, and vascular look without sacrificing safety or control. Run it smart, support your hormones properly, and you'll see why Masteron remains a cutting-phase essential in every serious athlete's toolbox.