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5β-Tetrahydrocortisol is an endogenous metabolite of hydrocortisone (cortisol; Item No. 20739).1,2 It is also an intermediate in the biosynthesis of β-cortol (Item No. 33412).2 It is formed from cortisol by steroid 5β-reductase and is dehydrogenated by 20β-hydroxysteroid dehydrogenase (20β-HSD) to produce β-cortol in the liver.3,1,2 Urinary levels of 5β-tetrahydrocortisol have been used as a marker for cortisol production and are associated with metabolic syndrome in obese individuals.4
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1. Role of a disordered steroid metabolome in the elucidation of sterol and steroid biosynthesis. Lipids 47(1), 1-12 (2012).
2. Human steroid biosynthesis, metabolism and excretion are differentially reflected by serum and urine steroid metabolomes: A comprehensive review. J. Steroid Biochem. Mol. Biol. 194, 105439 (2019).
3. Detailed analysis of cortisol, cortisone and their tetrahydro-
4. Increased urinary glucocorticoid metabolites are associated with metabolic syndrome, hypoadiponectinemia, insulin resistance and β cell dysfunction. Steroids 76(14), 1575-1581 (2011).