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Symptoms “A B12 deficiency can cause physical and neurological symptoms, and research is also growing to support that it can also cause psychological issues as well,” says Shapiro.
Its deficiency can cause neurodevelopmental problems which can be partly reversible with early treatment. [27] Only a small subset of dementia cases have been found to be reversible with vitamin B 12 therapy. [28] Tinnitus may be associated with vitamin B 12 deficiency. [29] Vitamin B 12 deficiency may accompany certain eating disorders or ...
Lack of vitamin B12 can cause megaloblastic anemia—a condition characterized by larger than normal red blood cells in a smaller than normal amount. This causes fatigue, paleness in the skin ...
A B12 deficiency can cause issue ranging from exhaustion to neurological problems. ... Vitamin B12 can be found in multivitamins, B-complex supplements, and by itself in a B12 supplement, which ...
Pernicious anemia is the most common cause of clinically evident vitamin B 12 deficiency worldwide. [14] Pernicious anemia due to autoimmune problems occurs in about one per 1000 people in the US. Among those over the age of 60, about 2% have the condition. [ 8 ]
[6] [15] [26] Vitamin B 12 deficiency can also cause symptoms of mania and psychosis. [27] [28] Among other problems, weakened immunity, reduced fertility and interruption of blood circulation in women may occur. [29] The main type of vitamin B12 deficiency anemia is pernicious anemia, [30] characterized by a triad of symptoms:
Over time, a deficiency of B12 can cause problems with balance, confusion, depression, poor memory and possibly dementia, and it can even cause permanent damage to the nervous system, Somers says.
People who suffer from irreversible causes of deficiency, such as pernicious anemia or old age, will need lifelong treatment with pharmacological doses of B 12. Strategy for treatment is dependent on the person's level of deficiency as well as their level of cognitive functioning. [ 29 ]