Colorado State University
Colorado State University: Vitamin D (Cholecalciferol, Calcitriol)
Learn how vitamin D is structured, synthesized and metabolized in the human body. Includes information on the health benefits of vitamin D and the effects of vitamin D deficiency.
US National Library of Medicine
Medline Plus: Vitamin D
This website on vitamin D is organized into the following sections: "Illustrations," "Definitions," "Function," "Food Sources," "Side Effects," and "Recommendations." Click on the thumbnail images in the "Illustrations" section to see...