Not to be confused with Dihydrotestosterone.
Structural formula
Space-filling model of the dihydrotachysterol molecule
Clinical data
AHFS/Drugs.com Micromedex Detailed Consumer Information
MedlinePlus a682335
ATC code A11CC02 (WHO)
CAS Number 67-96-9 YesY
PubChem (CID) 5311071
DrugBank DB01070 YesY
ChemSpider 4470607 YesY
KEGG D00299 YesY
ECHA InfoCard 100.000.611
Chemical and physical data
Formula C28H46O
Molar mass 398.664 g/mol
3D model (Jmol) Interactive image

Dihydrotachysterol (DHT) is a synthetic vitamin D analog activated in the liver that does not require renal hydroxylation like vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). DHT has a rapid onset of action (2 hours), a shorter half-life, and a greater effect on mineralization of bone salts than does vitamin D.[1]


  1. R. Gagnon; G. W. Ogden; G. Just; M. Kaye (1974). "Comparison of Dihydrotachysterol and 5,6-trans Vitamin D3 on Intestinal Calcium Absorption in Patients with Chronic Renal Failure". Canadian Journal of Physiology and Pharmacology. 52 (2): 272–274. doi:10.1139/y74-037. PMID 4365509.

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