Nandrolone Phenylpropionate Duncan
Nandrolone Phenylpropionate by Duncan Pharma, widely known as NPP, is the faster-acting cousin of Deca-Durabolin. It delivers the same quality muscle, strength and joint-support benefits of nandrolone, but the short phenylpropionate ester clears the body far quicker — meaning faster onset, easier control of side effects and a quicker exit if anything needs adjusting. That makes NPP a popular choice for lean bulks and for anyone who wants nandrolone without a long, slow ester.
| Active substance | Nandrolone Phenylpropionate |
| Manufacturer | Duncan Pharma |
| Form | Injectable oil solution |
| Typical dosage | 300–500 mg per week |
| Half-life | ~2–3 days |
| Classification | Injectable, lean bulk |
Effects and benefits
NPP builds quality muscle and strength while supporting joint health and recovery, just like Deca, but with a cleaner, faster profile and typically less water retention. The shorter ester requires more frequent injections but gives far more control over the cycle.
- Quality muscle and strength gains
- Faster onset than decanoate
- Joint support and improved recovery
- Easier side-effect control
Dosage and administration
Most users run 300–500 mg per week split into every-other-day injections, always alongside a testosterone base since nandrolone is suppressive. Compare it with the rest of the injectable steroids range when planning a lean-mass block.
Stacking and combinations
NPP pairs naturally with a short-ester test base such as Testosterone Propionate, while Nandrolone Decanoate is the longer-ester alternative for slower cycles.
Why choose Duncan Pharma
Duncan Pharma products are made to consistent pharmaceutical standards with dependable dosing. Explore the full Duncan range to build a matching stack.
| Characteristics | |
| Shelf Life | 36 months from manufacture date |
| Drug Class | Anabolic/Androgenic Steroid |
| Concentration | Typically 100 mg/ml |
| Half-Life | Approximately 4.5 days |
| Detection Time | Up to 12 months |
| Anabolic Index | 125 |
| Androgenic Index | 37 |
| Estrogen Level | Low to Moderate |
| Active Substance | Nandrolone Phenylpropionate |
| Aromatization | Low |
| Dosage | 200-600 mg per week |
| Drug Category | Anabolic Steroids |
| Form | Injectable solution |
| Oil-based | Yes |
| Product Packaging | 10 ml vial |
| Water Retention | Moderate |
| Progestational Activity | Moderate |
| Liver Toxicity | Low |
| Chemical Structure | C27H34O3 |