Nandrolone Phenylpropionate (NPP): Overview
Nandrolone Phenylpropionate (NPP) is a shorter-acting injectable anabolic steroid from the nandrolone family. It is similar to Nandrolone Decanoate (Deca Durabolin) but with a much shorter ester, resulting in a faster onset and shorter half-life.
🔬 Key Characteristics
| Feature | Description |
|---|---|
| Chemical Name | Nandrolone Phenylpropionate |
| Ester Type | Phenylpropionate (shorter ester) |
| Half-life | ~3–4 days |
| Injection Frequency | Every 2–3 days (or EOD) |
| Anabolic Rating | High (~125–130% of testosterone) |
| Androgenic Rating | Low (~37% of testosterone) |
| Aromatization | Moderate (less than testosterone) |
| Typical Concentration | 100 mg/mL or 150 mg/mL |
💪 Uses and Benefits
| Use | Description |
|---|---|
| Muscle Growth | Promotes significant lean mass and strength gains |
| Joint Relief | Known for relieving joint pain and improving collagen synthesis |
| Reduced Water Retention | Compared to longer esters, less water retention |
| Improved Recovery | Enhances muscle recovery and repair |
| Faster Clearance | Short ester allows quicker removal from system and easier PCT |
📆 Typical Dosages
| User Level | Dosage Range | Frequency |
|---|---|---|
| Beginner | 200–300 mg/week | 2–3× per week (EOD) |
| Intermediate | 400–600 mg/week | 2–3× per week (EOD) |
| Advanced | 600+ mg/week | 2–3× per week (EOD) |
⚠️ Side Effects
Estrogenic:
-
Can aromatize into estrogen, causing:
-
Gynecomastia
-
Water retention (usually less than testosterone)
-
Androgenic:
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Acne
-
Oily skin
-
Hair loss (in predisposed individuals)
Other Risks:
-
Suppression of natural testosterone production (significant)
-
Potential cardiovascular strain
-
Possible injection site pain or irritation
🔄 PCT (Post Cycle Therapy)
Because NPP suppresses natural testosterone, PCT is essential:
| Compound | Duration | Notes |
|---|---|---|
| Clomid | 4 weeks | Helps restore natural production |
| Nolvadex | 4 weeks | Estrogen antagonist |
| hCG (optional) | 2–3 weeks | Supports testicular function |
⚖️ Comparison: NPP vs Nandrolone Decanoate
| Feature | NPP | Decanoate (Deca) |
|---|---|---|
| Half-life | ~3–4 days | ~14 days |
| Injection Frequency | Every 2–3 days (EOD) | Once per week |
| Onset of Action | Faster | Slower |
| Water Retention | Lower | Higher |
| Detection Time (Drug Tests) | Shorter | Longer |
| PCT Planning | Easier due to shorter half-life | More complex, longer PCT |
📌 Summary: Nandrolone Phenylpropionate (NPP)
| Trait | Details |
|---|---|
| Type | Injectable anabolic steroid |
| Dosage | 200–600+ mg/week |
| Injection Frequency | Every 2–3 days |
| Effects | Lean muscle, joint relief |
| Side Effects | Moderate estrogenic, androgenic |
| PCT | Required |
⚠️ Important Note
NPP is a controlled substance in many countries. It should be used responsibly under medical guidance due to risks of side effects and hormonal suppression.
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