What are the signs and symptoms of a vitamin B12 deficiency?
Vitamin B12 deficiency develops slowly, and symptoms appear so gradually that they can be missed. Vitamin B12 deficiency can cause anemia over time. The symptoms of anemia include feeling weak, tired, and faint; heart palpitations; looking pale; and shortness of breath. Vitamin B12 deficiency can also cause tingling of hands and feet, changes in ability to walk, loss of vision, memory problems, seeing things that aren’t there, sadness, and changes in personality. Infants and young children who are vitamin B12 deficient might have problems growing, weak muscle tone, delays in development, and general weakness.
