US National Library of Medicine
Medline Plus: Vitamin A
This encyclopedia article is organized into the following sections: Illustrations, Alternative Names, Definition, Function, Food Sources, Side Effects, and Recommendations. Click the thumbnails in Illustrations to pull up two charts, one...
US National Library of Medicine
Medline Plus: Vitamin K
Organized into several very brief sections, this article on vitamin K includes information on vitamin K deficiency and the RDA (recommended dietary allowances) of this vitamin. Click on the thumbnail images in the "Illustrations,"...