Disclaimer
CompoundIQ publishes research summaries for informational and educational purposes only. Nothing on this site constitutes medical advice, diagnosis, or treatment recommendations. Always consult a licensed healthcare provider. Many compounds listed are research chemicals not approved for human use.
Methenolone Enanthate
Also known as: Primobolan, Primo, Primo E
Methenolone Enanthate (Primobolan) is a mild, DHT-derived injectable anabolic steroid famously reported to have been Arnold Schwarzenegger's preferred compound. It is one of the safest injectable steroids with a strong reputation for preserving lean muscle during caloric deficits. It is also one of the few steroids considered relatively safe for women.
Risk Level
Low RiskDifficulty
Intermediate| CAS Number | 303-42-4 |
| Molecular Formula | C27H42O3 |
| Class | Steroid |
| Category | Classic Steroids |
Mechanism of Action
A DHT-derivative with a 1-methyl group and a 3-keto group that provide moderate anabolic activity with low androgenic effects. Does not aromatize to estrogen. Has a strong binding affinity for androgen receptors. Enhances the immune system. Promotes nitrogen retention and protein synthesis with minimal water retention.
Dosing Research
Male performance dosing typically 400-800 mg per week, injected once or twice weekly. Female dosing typically 50-100 mg per week. Cycles are typically 12-20 weeks due to its mild nature requiring longer exposure for results. Often considered expensive due to high dosing requirements. Best results in cutting or lean-gaining phases.
Side Effects & Risks
One of the mildest side effect profiles among injectable steroids. Does not cause water retention or gynecomastia. Mild negative impact on lipid profiles. Low hepatotoxicity. Androgenic side effects are mild but possible, including hair loss in predisposed individuals. Still suppresses natural testosterone production, though less severely than many other compounds.
Research Studies
Related compounds
Testosterone Enanthate
SteroidTestosterone Enanthate is one of the most widely used testosterone esters for hormone replacement therapy and performance enhancement. It features a long-acting enanthate ester that provides sustained release over approximately 1-2 weeks, making it one of the most convenient injectable testosterone formulations.
Testosterone Cypionate
SteroidTestosterone Cypionate is a long-acting testosterone ester very similar in pharmacokinetics to Testosterone Enanthate. It is the most commonly prescribed form of testosterone in the United States for hormone replacement therapy and is widely used in performance enhancement contexts.
Testosterone Propionate
SteroidTestosterone Propionate is a short-acting testosterone ester that requires more frequent injections than longer-estered variants. It provides faster onset and clearance, making it preferred for shorter cycles, contest preparation, or situations where rapid clearance is desired.
Oxandrolone
SteroidOxandrolone (Anavar) is one of the mildest and most well-studied oral anabolic steroids. Originally developed for medical use in burn patients, muscle wasting, and osteoporosis, it is valued in performance enhancement for producing lean, dry gains with minimal side effects. It is one of the few steroids prescribed to women and children in clinical settings.
Disclaimer
CompoundIQ publishes research summaries for informational and educational purposes only. Nothing on this site constitutes medical advice, diagnosis, or treatment recommendations. Always consult a licensed healthcare provider. Many compounds listed are research chemicals not approved for human use.