Mayo Clinic
Mayo Clinic: Niacin (Vitamin B3, Nicotinic Acid)
A detailed overview of Niacin (vitamin B3). Content includes a look at its background, traditional and new uses, dosage recommendations, and more.
US National Library of Medicine
Medline Plus: Niacin
This encyclopedia article on niacin, or vitamin B3, is organized into the following sections: "Illustrations," "Alternative Names," "Definition," "Function," "Food Sources," "Side Effects," and "Recommendations." Click on the thumbnail...