What is Nandrolone Phenylpropionate (NPP)?
NPP is a fast-acting version of Nandrolone, one of the most well-known anabolic steroids around. It was originally developed to treat muscle-wasting conditions and anaemia. Think of it as the shorter-ester cousin of Deca-Durabolin — same compound, quicker in and out of your system.
Quick Facts
| Active Ingredient | Nandrolone Phenylpropionate 100mg/ml |
| Half-life | Approximately 2–3 days |
| Form | Injectable (oil-based) |
| Dose (Men) | 200–400mg per week |
| Dose (Women) | 25–50mg per week (low dose only) |
| Detection Time | Up to 12 months |
| Anabolic Rating | 125 |
| Androgenic Rating | 37 |
How Does It Work?
NPP binds to androgen receptors in muscle tissue, signalling the body to build and retain more muscle. It also boosts nitrogen retention and red blood cell production, which helps muscles recover faster and work harder. The phenylpropionate ester means it releases quickly, so it gets to work within days rather than weeks.
What It's Used For
- Building lean muscle mass with less water retention than longer esters
- Improving recovery time between training sessions
- Supporting joint comfort during heavy lifting cycles
What to Expect
Most users notice steady, quality muscle gains rather than rapid water-bloated size. Joint comfort often improves noticeably, which is a big reason many lifters use it alongside other compounds. Because the ester clears quickly, results build up faster and side effects are easier to manage compared to Deca.
Possible Side Effects
- Natural testosterone suppression — PCT is essential after use
- Increased prolactin levels, which may cause unwanted effects without a dopamine agonist on hand
- Mild androgenic effects such as oily skin or acne, though these are relatively low with NPP
Cycle & Dosage Notes
A typical cycle runs 8–12 weeks, with injections every other day or three times per week to keep blood levels stable. NPP stacks well with testosterone, which should always be run as a base to offset suppression. A full PCT protocol is required after the cycle ends — allow at least a few days after your last injection before starting.
Storage
Keep at room temperature (15–25°C), away from light and moisture. Leave in the original packaging.
This info is for research and educational purposes only. Check the laws in your country before ordering.
