Here are the sources of information that we used to compile this website:

www.cc.nih.gov/ccc/supplements/vitb12.html

www.vegsoc.org/info/b12.html

http://www.anyvitamins.com/vitamin-b12-cyanocobamin-info.htm

http://www.lifeclinic.com/focus/nutrition/vitamin-b12.asp

http://www.beyondveg.com/walsh-s/vitamin-b12/vegans-1.shtml

http://www.vnv.org.au/Nutrients/VitaminB12.htm