Mesterolone vs Nandrolone Phenylpropionate
A side-by-side research comparison of Mesterolone and Nandrolone Phenylpropionate across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Mesterolone | Nandrolone Phenylpropionate |
|---|---|---|
| Full name | Mesterolone (Proviron) | Nandrolone Phenylpropionate (NPP) |
| Category | Anabolic Steroids | Anabolic Steroids |
| Status | Prescription drug (controlled substance) | Prescription drug (controlled substance) |
| Mechanism | Mesterolone is a DHT derivative that is orally active without 17aa alkylation (so low liver stress). It binds SHBG strongly, freeing up other androgens, and has anti-estrogenic effects, but weak muscle-building activity on its own. | Same active hormone as Deca (nandrolone) but with a shorter phenylpropionate ester, giving quicker onset and faster clearance. Acts on androgen receptors with high anabolic and reduced androgenic activity. |
| Molecular weight | 304.5 Da | 406.6 Da |
| Half-life | ~12 hours | ~2.5-4.5 days |
| Bioavailability | Oral | Intramuscular injection |
| Typical dose | Medical: ~25-75 mg/day | Variable; more frequent than Deca |
| Frequency | Daily (1-3 doses) | Every 2-3 days |
| Route | Oral tablet | Intramuscular injection |
Mesterolone reported benefits
- Lowers SHBG (more free androgen)
- Anti-estrogenic effect
- Muscle hardness
- Low liver stress
- Supports libido
Nandrolone Phenylpropionate reported benefits
- Lean mass gains
- Faster onset than Deca
- Faster clearance (flexibility)
- Reputed joint comfort
Related comparisons
Research and educational reference only. Not medical advice.