Strict vegetarians, people with pernicious anemia, and elderly adults are at an increased risk for developing vitamin B12 deficiencies. Possible signs of a deficiency include soreness of the mouth or tongue, fatigue, poor memory, and weight loss. A vitamin B12 deficiency can be treated with injectable, oral, and nasal spray forms of the vitamin. If left untreated, a deficiency can lead to permanent nerve damage.
(Click Vitamin B12 Deficiency for more information on what problems may develop as a result of a deficiency, what other symptoms may occur, and what specific treatment options are available. You can also click any of the links in the box to the right for specific information.)