» Facts About Vitamin B12    Gives detailed content about basic functions, deficiency symptoms, good food sources, and RDA recommendations.    http://ods.od.nih.gov/factsheets/vitaminb12.asp

» Vitamin B-12    Includes role vitamin plays in body, food sources, deficiency signs, and serving size of selected foods with B-12 content.    http://www.hoptechno.com/book29e.htm

» Vitamin B12    An introduction to this vitamin, functions, dietary sources and required intake from The Vegetarian Society UK.    http://www.vegsoc.org/info/b12.html

» Vitamin B12 (Cobalamin)    Information includes deficiency signs, good foods high in the vitamin, functions, and suggested dosage.    http://www.anyvitamins.com/vitamin-b12-cyanocobamin-info.htm

» Vitamin B12 - The Linus Pauling Institute    Professional review including information on the functions, food sources, deficiency diseases, drug interactions, and recommened daily intakes of vitamin B12.    http://lpi.oregonstate.edu/infocenter/vitamins/vitaminB12/