Technical Note: Determination of Cholecalciferol (Vitamin D₃) in Standard Reference Material 3532 Calcium-Containing Solid Oral Dosage Form.

Vitamin D is an important nutrient for many areas of human health and well-being, including improved bone strength, muscle movement, cognitive function, and immune health. The National Institute of Standards and Technology, in collaboration with the National Institutes of Health Office of Dietary Supplements, has developed SRM 3532 Calcium-Containing Solid Oral Dosage Form to help address the analytical challenges seen by the dietary supplement communities for the determination of vitamin D3 (cholecalciferol) and elements. Described here is the process to assess the homogeneity and stability of the material, as well as the value assignment of the vitamin D3 levels.