This chemical compound is water soluble and found in a variety of foods. It is also used as an additive in some foods, and can be taken as a supplement. Due to its mineral content being primarily derived from cobalt, B12 compounds are referred to as cobalamins, and methylcobalamin and 5-deoxyadenosylcobalamin are the two forms of B12 that are know to be active in human metabolism. Vitamin B12 is essential to the proper formation of red blood cells, as well as proper neurological function. The human body also requires B12 as cofactor with methionine synthase in order to to synthesize DNA, RNA, proteins, hormones, and lipids. It is also required for the proper metabolism of proteins and fats within the body, making it one of the most important chemicals to supplement for health and wellness enthusiasts. Fish, dairy, eggs, beef, and poultry are all dietary sources of Vitamin B12. Adequate daily intake for adults is 2.4 mcg daily for both men and women.