Vitamin B12 has been credited as the largest, most complex vitamin. The function of vitamin B12 is to assist with the synthesis of an amino acid. The result of the action has been determined to prevent cancer and cardiovascular diseases. Vitamin B12 also assists in a biochemical reaction that is responsible for the production of energy from fats and proteins. Vitamin B12 is essential to the process that synthesizes hemoglobin. Hemoglobin is responsible for carrying oxygen in red blood cells.
The recommended daily intake of Vitamin B12 varies in regard to age. Adolescents and adults should consume 2.4 mcg every day. Most people in the US take in amounts that exceed, usually double, the amount recommended. Vitamin B12 is found in animal products. Vegetation products do not contain vitamin B12. Clams, crabs, and muscles contain the highest amounts of vitamin B12. Three ounces of beef provide 2.1 mcg of vitamin B12. Vegetarians can obtain the daily recommended value through milk or a daily supplement.