Nandrolone Phenylpropionate (NPP)
Also known as NPP, Fast Deca, Durabolin
The short-ester version of nandrolone - same compound as Deca, in and out much faster.
Anabolic steroid — not a peptide
This compound is an anabolic steroid, not a research peptide. It has a different risk profile, legal status, and side-effect spectrum. The information here is for education only and is not medical advice or a recommendation to use. Read the medical disclaimer.
How it's taken (route)
a deeper shot into a muscle, usually the glute, thigh, or shoulder
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- Documented dose
- 50–150 mg
- Typical frequency
- Every other day
- Cycle
- 10 weeks on, 10 off
- Half-life
- Roughly 2-3 days
- Common vial sizes
- 100 mg
- Regulatory status
- Controlled anabolic steroid (Schedule III in the US). Prescription only.
Dose on a U-100 syringe
This dose is too large to draw in one standard U-100 insulin syringe at common mixes. It is typically drawn from a larger vial, mixed at a higher concentration, or split into more than one injection. Run your own vial through the reconstitution calculator.
What it does
NPP gives the same mass and joint benefits as Deca but with a short ester, so it acts within days and clears within about a week. That makes it easier to stop quickly if sides appear, at the cost of injecting every other day.
Mechanism
Same 19-nortestosterone mechanism as Deca, only with a shorter ester. Raises prolactin in some users.
Storage — lyophilisedwhat's this?
Oil solution: room temperature, away from light.
Storage — reconstitutedwhat's this?
Keep the vial clean and use within the labelled shelf life.
Reconstitution noteswhat's this?
Ready to inject. Frequent injections mean strict site rotation matters.
Commonly reported side effects
- Sexual dysfunction and low libido
- Raised prolactin
- Suppression of natural testosterone
- Water retention
- Mood changes
Contraindications noted
- History of erectile or libido problems
- Prolactin disorders
- Trying to conceive
- Prostate or breast cancer
- Uncontrolled hypertension
- Under 21 years of age
Research notes
Same evidence base as nandrolone decanoate. Preferred when a faster exit strategy is wanted.
Vendors carrying Nandrolone Phenylpropionate (NPP)
These research suppliers list this compound. Prices, vial sizes and testing vary — always check the current lot certificate before you buy.
Peptide Streak does not sell peptides and is not affiliated with these vendors. Some list metabolic compounds under coded product names.