NPP (Nandrolone Phenylpropionate)
A profile on "Fast Deca," offering the mass-building benefits of Nandrolone with faster onset and easier side effect management.
NPP (Nandrolone Phenylpropionate)
Nandrolone Phenylpropionate (NPP) is chemically identical to Deca-Durabolin, except for the ester. While Deca uses the long Decanoate ester, NPP uses the shorter Phenylpropionate ester.
For many modern bodybuilders, NPP is the preferred form of Nandrolone because it hits faster and clears the system much quicker, allowing for better control if side effects (like anxiety or ED) occur.
Quick Specs
| Property | Value |
|---|---|
| Active Compound | Nandrolone |
| Half-Life | ~4.5 Days |
| Detection Time | ~11-12 Months |
| Anabolic/Androgenic Ratio | 125 : 37 |
| Chemical Family | 19-Nor |
| Administration | Injectable (IM) |
Mechanism of Action
See Deca-Durabolin. The biological action is identical; only the release rate differs.
Ester Weight: The Phenylpropionate ester is lighter than the Decanoate ester. This means 100mg of NPP contains more active Nandrolone than 100mg of Deca.
Pharmacokinetics & Dosing
Half-Life: ~4.5 Days
- Frequency: Must be injected Every Other Day (EOD) or Every 3 Days (E3D) to maintain stable blood levels.
- Kick-in: Effects are felt within week 1-2, versus week 4-6 for Deca.
Primary Effects
1. Rapid Mass
NPP produces the same fullness and size as Deca but much sooner.
2. Less Water Retention
Anecdotally, many users report holding less subcutaneous water on NPP compared to Deca. This may be due to more stable blood levels achieved through frequent injection.
3. Joint Relief
Provides the same collagen synthesis and synovial fluid benefits as Deca.
Side Effects & Harm Reduction
Control:
The NPP Advantage: If you experience "Deca Dick" or severe mental side effects on Deca, you are stuck with the drug in your system for weeks. With NPP, if you stop injecting, the compound clears your system in roughly 5-7 days.
1. Prolactin
Still a major concern. Monitor nipple sensitivity and libido.
2. Neurochemistry
Some users report depression or anxiety on 19-nors. NPP allows you to "bail out" of the cycle quickly if this happens.
3. Injection Frequency
Requires more frequent pinning than Deca, which increases scar tissue risk.
Tracking NPP
Using the Anabolic Tracker app:
- Inventory: Add NPP.
- Scheduling: Set to Every Other Day or 3x Weekly (Mon/Wed/Fri).
- Site Rotation: Essential due to frequency.
- PCT: PCT can start roughly 1 week after the last injection, making it much friendlier for recovery than Deca.
Disclaimer:
This guide is for informational purposes only. NPP is a controlled substance. Misuse can lead to permanent health damage. Always consult with a medical professional.