Primobolan 25mg
25 mg · 100 tablets · Oral research compound — Primobolan 25 mg (Methenolone Acetate) is a mild, DHT-based anabolic ideal for lean-mass preservation, nitrogen balance, and catabolic-state models. Its low androgenic and hepatic impact make it suitable for extended protocols with minimal risk.
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Description
Primobolan 25 mg
Brand: Magnus Pharmaceuticals
Content: 100 tablets | 25 mg per tablet
Price: €46
Manufactured in: Europe
🧪 Product Overview
Primobolan 25 mg offers researchers an oral DHT-derived anabolic compound with exceptionally low androgenic and hepatic burden. Known scientifically as methenolone acetate, it is widely used in lean-mass preservation, catabolic-state models, and nitrogen-balance studies.
The acetate ester gives Primobolan a short oral half-life (~3–5 hours), requiring twice-daily dosing for stable plasma levels. Its minimal aromatisation, mild androgenicity, and long detection window (>10 days via LC-MS/MS) make it a key substance in cutting-phase protocols and anti-doping method development.
✅ Key Research Highlights
Mild androgenic profile: In vitro studies show myotrophic potency exceeding testosterone, yet lower androgenic signaling
Short half-life (oral): 3–5 hours; plasma levels best sustained by ≥2 daily doses
Liver safety: Absence of 17-α-methyl group significantly reduces hepatotoxic risk
Minimal aromatisation: Estrogen conversion is virtually absent, reducing gynecomastia risk
Nitrogen retention: Clinical data confirms reduced urinary nitrogen loss in muscle-wasting states
Anti-doping classification: Long-term urinary metabolites allow detection >10 days post-exposure (WADA S1 listed)
🔬 Suggested Laboratory Applications
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Lean-mass preservation in cutting-phase or post-illness models
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Separation of androgenic and estrogenic pathways in body-recomp studies
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Anti-doping detection trials with long half-life steroids
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Muscle-wasting and catabolic stress research
📊 Technical Specifications
| Field | Data |
|---|---|
| Chemical Name | Methenolone Acetate |
| Chemical Formula | C<sub>22</sub>H<sub>32</sub>O<sub>3</sub> |
| Synonyms | Primobolan, Metenolone Acetate, Nibal |
| Molecular Weight | 344.5 g/mol |
| CAS Number | 434-05-9 |
| Oral Half-life | ≈ 3–5 hours (split dosing required) |
| Detection Window | >10 days (long-term metabolite) |
| Documented Benefits | Lean-tissue preservation, minimal water gain, low androgenic impact |
| Main Risks | HDL↓, testosterone suppression, rare cholestasis |
| Total Active Compound | 2,500 mg per box (25 mg × 100 tablets) |
| Storage / Shelf-life | Store ≤ 25 °C · 36 months (manufacturer specification) |
⚙️ PubChem-Supported Research Insights
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Effective for nitrogen-balance support and lean-tissue preservation
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Minimal hepatic stress compared to alkylated orals
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Near-zero aromatisation supports estrogen-sensitive models
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Ideal for testing long-range anti-doping detection protocols
⚠️ Documented Research Side Effects
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Reversible HDL suppression and mild HPG-axis inhibition
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Rare reports of cholestasis in long-term exposure
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Testosterone suppression in male models
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Long-term metabolite excretion (WADA-positive)
🧯 Handling & Compliance
For Research Use Only — Not for human or veterinary use
Store at 15–25°C, protect from light and moisture
Follow SDS guidelines for safe handling
Purchase confirms qualified researcher status
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