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Hi
High vitamin B12 is a symptom of an underlying illness that causes the amount in your blood to increase. For example, a damaged liver may release the vitamin out of storage and into the blood. In early stages, illnesses associated with high vitamin B12 often have generic symptoms, such as fatigue and loss of appetite. Considering they’re potentially life-threatening conditions, early diagnosis is vital, so consult your physician when you don’t feel up to par.
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