Description
Drostanolone Propionate (Masteron) ZPHC – 1 ml Ampoules (100 mg/ml)
Drostanolone Propionate, commonly known as Masteron, from ZPHC is an injectable anabolic steroid widely used in bodybuilding and physique sports, especially during cutting phases. It is valued for improving muscle hardness, density, and definition without causing water retention.
It is a short-ester compound, meaning it acts quickly in the body but also requires more frequent injections to maintain stable levels.
Steroid Profile
Active ingredient: Drostanolone Propionate
Anabolic activity: ~62% compared to testosterone
Androgenic activity: ~25% compared to testosterone
Aromatization: none (does not convert to estrogen)
Half-life: ~1–2 days
Liver toxicity: low (injectable form)
Detection time: up to ~3 weeks
Typical concentration: 100 mg/ml
Key Characteristics
Masteron is not a mass-building steroid. Instead, it is primarily used to enhance physique quality by increasing muscle density and reducing the appearance of water retention. It is most effective at lower body fat levels where muscle definition becomes more visible.
Effects and Benefits
- Increases muscle hardness and density
- Enhances muscle definition and vascularity
- Helps maintain lean muscle during calorie deficits
- No estrogen conversion, so no water retention or estrogen-related bloating
- Mild fat-loss support through metabolic and androgenic effects
- Improves overall “dry” and conditioned appearance
Advantages of ZPHC Ampoules
- Accurate dosing at 100 mg/ml
- Sterile single-use ampoules
- Fast-acting ester for predictable results
- Convenient storage and transport
General Use Information
Common performance-related use:
- 300–500 mg per week (men)
- Injections typically every other day
- Cycle length: ~6–10 weeks
Masteron is often used in cutting or pre-contest phases and is frequently combined with testosterone to maintain hormonal balance.
Common Combinations
- Testosterone propionate for hormonal support
- Trenbolone for extreme cutting and hardness
- Winstrol for additional definition and dryness
- Primobolan for lean, low-water gains
Benefits in Training Context
- Very dry, hard muscle appearance
- Improved definition and physique sharpness
- Muscle preservation during dieting phases
- Better visual conditioning for competition or aesthetics
Side Effects
- Suppression of natural testosterone production
- Acne and oily skin
- Hair loss in genetically predisposed individuals
- Increased body hair growth
- Mood changes or irritability in some users
- Mild cardiovascular strain (lipids, blood pressure)


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