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Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [ 5 ] Symptoms can vary from none to severe. [ 1 ] Mild deficiency may have few or absent symptoms. [ 1 ]
Frequency. 1 per 1000 people [8] Pernicious anemia is a disease where not enough red blood cells are produced due to a deficiency of vitamin B 12. [5] Those affected often have a gradual onset. [5] The most common initial symptoms are feeling tired and weak. [4]
Deficiency symptoms in children include developmental delay, regression, irritability, involuntary movements and hypotonia. [33] Vitamin B 12 deficiency is most commonly caused by malabsorption, but can also result from low intake, immune gastritis, low presence of binding proteins, or use of certain medications. [6]
A vitamin B12 deficiency can be caused by a gastrointestinal disorder or a lack of B12 in your diet. Signs of a B12 deficiency include weakness, fatigue, and tingling or numbness in the hands and ...
B12 is crucial for many important functions, and, with a few exceptions, the only way to get it is through animal-based foods or B12 supplements. “Vitamin B12 is an essential water-soluble ...
Vitamin B12 deficiency symptoms . Vitamin B12 deficiency has a few hallmark symptoms, according to doctors: Lack of energy. Mental fatigue. Nausea, vomiting, or diarrhea. Lack of appetite.
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