19-Noretiocholanolone, also known as 5β-estran-3α-ol-17-one, is a metabolite of nandrolone (19-nortestosterone) and bolandione (19-norandrostenedione) that is formed by 5α-reductase.

It is on the list of substances prohibited by the World Anti-Doping Agency since it is a detectable metabolite of nandrolone, an anabolic-androgenic steroid (AAS).

[1] Consumption of boar meat, liver, kidneys and heart have been found to increase urinary 19-noretiocholanolone output.

[2] This pharmacology-related article is a stub.

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