• Organization: U.S. Department of Health & Human Services
• Updated: 2025-09-06

The biologically active metabolite of vitamin D3, 1α,25-dihydroxyvitamin D3 [1α,25(OH)2D3], acts through vitamin D receptors, which were found in rheumatoid tissues in the present study....

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• Organization: National Institute of Standards and Technology
• Updated: 2017-01-05 00:00:00

SRM 972a Vitamin D Metabolites in Frozen Human Serum - This Standard Reference Material (SRM) is intended for use as an accuracy control in the critical evaluation of methods for determining the...

• Organization: National Institute of Standards and Technology
• Updated: 2017-01-05 00:00:00

SRM 2973 Vitamin D Metabolites in Frozen Human Serum (High Level) - This Standard Reference Material (SRM) is intended for use as an accuracy control in the critical evaluation of methods for...