Mastabol 100

What is Mastabol 100?

Mastabol 100, containing Drostanolone Propionate, is an injectable anabolic-androgenic steroid (AAS) at 100 mg/ml in a 10 ml vial from British Dragon. Known as Masteron, it was historically used for breast cancer treatment and is now popular in bodybuilding for cutting cycles to enhance muscle definition and hardness. It has low hepatotoxicity, does not aromatize, and has a high anabolic-to-androgenic ratio (~62:25 vs. testosterone's 100:100).

How Long Does Mastabol 100 Stay in Your System?

Drostanolone Propionate has a half-life of approximately 2.5 days, requiring every-other-day injections for stable blood levels. It remains detectable in the body for about 3-4 weeks, depending on dosage, metabolism, and testing methods. Bloodwork and professional guidance are advised for precise clearance timelines.

Mechanism of Action Mastabol 100

Drostanolone Propionate binds to androgen receptors (AR), promoting protein synthesis and fat metabolism while inhibiting aromatization, preventing estrogen conversion. Its DHT-derived structure enhances muscle hardness and reduces subcutaneous water retention, delivering a dry, vascular look. Users notice improved definition and strength within days to weeks. Its anti-estrogenic properties reduce gynecomastia risk, but testosterone suppression requires PCT.

How It Works & Key Benefits

Mastabol 100 excels for bodybuilders in cutting cycles, requiring a calorie-deficit, high-protein diet and intense training to maximize its fat-burning and muscle-defining effects.

• Promotes muscle hardness and definition without bloating.
• Enhances strength and vascularity for performance.
• Supports fat loss for a shredded, dry physique.
• Reduces estrogenic side effects like water retention.
• Improves muscle density and recovery.
• Stacks effectively for tailored physique goals.

Who It's For & Product Specifications

Best for intermediate to advanced bodybuilders seeking muscle definition and hardness in cutting cycles; suitable for men and women (with lower doses for women to avoid virilization). Not recommended for beginners or those with cardiovascular issues.

What is Mastabol 100 Used For in Bodybuilding?

Mastabol 100 is used in bodybuilding for cutting cycles to enhance muscle hardness, promote fat loss, and achieve a defined, vascular physique. It's ideal for pre-competition prep or achieving a shredded look while preserving lean muscle mass.

How to Take Mastabol 100

1. Dosage: Men: 300-500 mg/week (3-5 ml), split into every-other-day (EOD) injections (e.g., 100 mg EOD); Women: 50-100 mg/week (0.5-1 ml EOD). Start low to assess tolerance.
2. Frequency: Every other day (EOD) for stable blood levels due to short half-life.
3. Cycle length: 6-8 weeks for optimal results and safety.
4. Preparation/Monitoring tips: Use sterile syringes, rotate injection sites (glutes, quads); monitor lipids and testosterone via labs; maintain high-protein diet (2g/kg body weight); stack with testosterone to avoid lethargy.
5. Results timeline: Muscle hardness and definition in 1-2 weeks; peak physique by 4-6 weeks.
6. PCT timing: Start 3-5 days after last injection; use tamoxifen (20-40 mg/day) or clomiphene (50-100 mg/day) for 4-6 weeks, guided by bloodwork.

How to Cycle Mastabol 100

Mastabol 100 is typically cycled for 6-8 weeks due to its short half-life. A common protocol is 300-500 mg/week for men (100 mg EOD) or 50-100 mg/week for women (25-50 mg EOD). Stack with testosterone (e.g., Testosterone Propionate) to maintain libido and hormonal balance. Start PCT 3-5 days after the last injection, using tamoxifen or clomiphene for 4-6 weeks. Bloodwork guides dosing and PCT timing.

Popular Stacks

Testosterone Propionate: Balances hormones and enhances lean gains.

Winstrol: Amplifies muscle definition and hardness.

Anavar: Supports lean muscle preservation in cutting.

Cycle Support: Protects lipid and liver health during cycles.

Comparisons & Alternatives

Mastabol 100 vs Winstrol: Mastabol 100 is injectable with anti-estrogenic effects; Winstrol is available oral/injectable, emphasizing strength and fat loss.

Mastabol 100 vs Primobolan: Mastabol 100 is stronger for hardness; Primobolan is milder for lean gains.

Mastabol 100 vs Trenbolone: Mastabol 100 is milder with less side effects; Trenbolone is more potent but harsher.

Side Effects & Risk Management

• Androgenic: Acne, hair loss—use Accutane for skin, monitor scalp.
• Cardiometabolic: Cholesterol changes—monitor lipids, use omega-3s.
• Endocrine: Testosterone suppression—plan PCT with SERMs.
• Systemic: Injection site pain—rotate sites, use sterile technique.
• Hepatic: Low impact—routine liver tests advised.

Review labs with a professional where lawful to ensure authenticity and safe dosing.

Post-Cycle Therapy (PCT)

Start PCT 3-5 days after last injection due to short half-life; use tamoxifen (20-40 mg/day) or clomiphene (50-100 mg/day) for 4-6 weeks. Bloodwork guides HPTA recovery, ensuring sustained gains and hormonal balance.