Vitamin B12, Cobalamin


	Vitamin B12 Forms: Cobalamin, Cyanocobalamin Sources: Meats, milk, eggs, fish RDA: 2.4 mcg for adults Description: Vitamin B12 is needed for the synthesis of methionine which is in turn needed for the synthesis of all proteins and enzymes. Consequently, vitamin B12 is necessary for proper nervous system function and for the manufacture of hemoglobin. A deficiency can lead to numbness in the extremities, memory loss, and dementia. Other symptoms of vitamin B12 deficiency include megaloblastic anemia, sore tongue, and loss of appetite. A deficiency can result from malabsorption and certain autoimmune disorders. Also, vitamin B12 is found mostly in animal food products and therefore, vegans are wise to take vitamin B12 supplements. No toxic effects are noted with vitamin B12 supplementation (even with extremely large doses). Find foods (no breakfast cereals) that have highest amounts of Vitamin B₁₂ per gram. Find foods (no breakfast cereals) that have highest amounts of Vitamin B₁₂ per Calorie.