S 23 (Mastorin)

What is S 23 (Mastorin)?

S 23, or Mastorin, is a selective androgen receptor modulator (SARM) classified as an oral compound in this 10 mg/tab, 100-tab pack from Dragon Pharma. Developed for muscle-wasting conditions, it's used in bodybuilding for lean muscle growth, strength, and fat loss. As an oral SARM, it has minimal hepatotoxicity, no aromatization, but significant HPTA suppression, requiring careful monitoring.

Mechanism of Action S 23 (Mastorin)

S 23 binds selectively to androgen receptors in muscle and bone tissues, promoting protein synthesis and nitrogen retention for lean muscle growth and strength. It enhances fat metabolism, contributing to a defined, hard physique. Users notice improved muscle density and strength within weeks, particularly in low body fat states (under 15%).

With a half-life of approximately 12 hours, S 23 requires daily or twice-daily dosing for stable blood levels. It doesn't aromatize, avoiding estrogenic side effects, but its strong androgenic binding may suppress testosterone significantly. What doesn't happen: no gynecomastia or water retention, but PCT is essential due to suppression.

Overuse may cause testosterone suppression or androgenic side effects, manageable with proper dosing and PCT.

How It Works & Key Benefits

S 23 excels for bodybuilders in cutting cycles, requiring a high-protein, calorie-controlled diet and intense training to maximize its anabolic and fat-burning potential.

• Promotes lean muscle growth without bloating.
• Enhances muscle hardness and vascularity.
• Boosts strength during calorie deficits.
• Supports fat loss for a shredded physique.
• Improves workout performance and recovery.
• Stacks effectively for tailored cutting goals.

Who It's For & Product Specifications

Best for intermediate to advanced bodybuilders seeking lean muscle, strength, and definition in cutting cycles; suitable for men. Not recommended for beginners, women (due to virilization risk), or those with cardiovascular or liver issues.

How to Use

1. Dosage: 10-30 mg/day for men, split into 1-2 doses; start at 10 mg to assess tolerance.
2. Frequency: Daily or twice daily (e.g., morning and evening) due to short half-life.
3. Cycle length: 6-8 weeks to balance efficacy and safety.
4. Preparation/Monitoring tips: Take with or without food; monitor testosterone and lipids via labs; maintain high-protein diet (2g/kg body weight); use liver support like milk thistle if needed.
5. Results timeline: Muscle definition and strength in 1-2 weeks; peak results by 6-8 weeks.
6. PCT timing: Start 1-2 days after last dose; use tamoxifen (20-40 mg/day) or clomiphene (50-100 mg/day) for 4-6 weeks, guided by bloodwork.

Popular Stacks

Ostarine: Supports lean muscle preservation in cutting cycles.

GW 501516: Enhances fat loss and endurance.

LGD 4033: Boosts muscle growth for hybrid cycles.

Cycle Support: Protects liver and lipid health during cycles.

Comparisons & Alternatives

S 23 vs Ostarine: S 23 is more potent for cutting and definition; Ostarine is milder, better for beginners.

S 23 vs RAD 140: S 23 excels for lean definition; RAD 140 is stronger for muscle growth but more suppressive.

S 23 vs Winstrol: S 23 offers similar hardness with less joint stress; Winstrol is a steroid with harsher side effects.

Side Effects & Risk Management

• Endocrine: Significant testosterone suppression—plan PCT with SERMs.
• Cardiometabolic: Lipid changes—monitor labs, use omega-3s.
• Hepatic: Minimal strain—routine liver tests advised.
• Androgenic: Hair loss, acne—use Accutane for skin control.
• Systemic: Fatigue, mood changes—adjust dose if occurs.

Review labs with a professional where lawful to ensure authenticity and disciplined dosing for safety.

Post-Cycle Therapy (PCT)

Start PCT 1-2 days after last dose due to oral form; 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.