Nandrolone
Also known as: deca, npp, deca-durabolin
The 'deca'/'NPP' steroid; known for joint comfort claims and for a long detection window.
Injectable anabolic-androgenic steroidsAnabolic-androgenic steroidEvidence for performance claims:Silver· human data
Legal status: UK: Class C controlled drug and prescription-only medicine. Supplying it (including to friends) and importing it by post are criminal offences; personal possession for your own use generally is not. Checked 2026-07-26.
Prohibited in sport: Yes — on the WADA Prohibited List.
Full breakdown in progress
We hold this page to the same bar as every other: each claim verified against a primary source before it is published. This compound’s full breakdown is being reviewed and will appear here once it clears that check. The legal status and safety information above stand.