Cyberdiet: Niacin: Brief description of the vitamin such as good food sources, role of vitamin, and deficiency symptoms.
Niacin - The Linus Pauling Institute: Professional review of the functions, food sources, deficiency diseases, drug interactions, and recommened daily intakes of niacin.
Zest for Life: Vitamin B3-Niacin: Brief look at the vitamin with basic functions, good food sources, and deficiency signs.