Nandrolone Decanoate vs Nandrolone Phenylpropionate
A side-by-side research comparison of Nandrolone Decanoate and Nandrolone Phenylpropionate across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Nandrolone Decanoate | Nandrolone Phenylpropionate |
|---|---|---|
| Full name | Nandrolone Decanoate (Deca-Durabolin) | Nandrolone Phenylpropionate (NPP) |
| Category | Anabolic Steroids | Anabolic Steroids |
| Status | Prescription drug (controlled substance) | Prescription drug (controlled substance) |
| Mechanism | Nandrolone is testosterone lacking the 19-carbon methyl group, giving it high anabolic and lower androgenic activity. It binds androgen receptors and, unlike testosterone, converts to a weaker androgen (rather than DHT) in some tissues, reducing certain androgenic effects but not estrogen-related ones. | 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 | 428.6 Da | 406.6 Da |
| Half-life | ~6-12 days | ~2.5-4.5 days |
| Bioavailability | Intramuscular injection | Intramuscular injection |
| Typical dose | Medical: ~50-100 mg every 1-4 weeks | Variable; more frequent than Deca |
| Frequency | Weekly to monthly (medical) | Every 2-3 days |
| Route | Intramuscular injection | Intramuscular injection |
Nandrolone Decanoate reported benefits
- Lean muscle mass gains
- Reputed joint comfort
- Increased red blood cell production
- Treats certain anemias/wasting (medical)
- Improved nitrogen retention
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.