Nandrolone Phenylpropionate, commonly referred to as NPP, is the short ester counterpart to Nandrolone Decanoate (Deca Durabolin) — delivering the same base compound with a significantly faster release profile. CSD’s formulation supplies 100mg/mL in a 10mL multi dose vial using cottonseed oil as the carrier base, providing a stable, well tolerated medium with a long track record in oil based injectable preparations.

The phenylpropionate ester gives NPP a half life of approximately 4–5 days, compared to the 15 day half life of its decanoate counterpart. This shorter active window requires more frequent administration to maintain stable blood concentration levels, but offers researchers greater control over compound presence — levels clear more quickly if administration is discontinued, which is a meaningful variable in protocols where adjustability is a priority. This distinction makes NPP and Deca Durabolin fundamentally different research tools despite sharing the same base compound.

Like all 19-nor steroids, Nandrolone Phenylpropionate lacks the carbon atom at the 19th position of the testosterone structure, producing a distinct interaction with androgen receptors and a substantially lower rate of aromatisation compared to testosterone based compounds. NPP is frequently studied in research examining anabolic activity, connective tissue, and joint related endpoints — areas where nandrolone compounds have accumulated a significant body of clinical literature.

Every batch of CSD’s NPP is third party lab tested for concentration accuracy and purity prior to release, with COA documentation available on request. Canada Steroid Depot has supplied Canadian customers with consistently verified, accurately dosed compounds for years. All orders ship discreetly across Canada in plain, unmarked packaging with no identifying information on the exterior.

Store at room temperature away from direct light and heat. Do not freeze. Intended for research purposes only.

Commonly researched alongside a testosterone base compound. Browse CSD’s full injectable range and PCT compounds for complete protocol sourcing.