Vitamin B12

B12 is a vitamin that is necessary for normal red blood cell (RBC) formation, neurologic function, and DNA production. B12 must be supplied by the diet or supplementation because the body is not able to produce it.

People who are deficient in Vitamin B12 may not have any symptoms or may present with symptoms of anemia or nerve damage. General symptoms related to anemia and nerve damage include fatigue, weakness, difficulty concentrating, depression, numbness or tingling in the hands and feet, headaches, moodiness, and gastrointestinal symptoms. Some people may not have all or any of these symptoms but still have deficiency. Early detection is important to prevent irreversible damage over time, especially to the nervous system.