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Anabolic-androgenic steroid

Nandrolone

Also known as Deca-Durabolin (decanoate), NPP (phenylpropionate).

What it is
A 19-nortestosterone derivative. The decanoate ester (Deca) is long-acting; phenylpropionate (NPP) clears faster.
Used for
Used in mass/recovery contexts. Long ester = less frequent injections but slower to clear.
Half-life
Decanoate ~6–12 days · NPP ~2.7 days
Handling
Oil-based; room temperature.
Watch for
Progestogenic activity; known for libido/erectile side effects ("deca dick") if not managed.
Calculate a dose →See its levels over time →
Educational reference only — not medical advice, not a recommendation to use Nandrolone.