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Your physician first would do a blood test on you to determine the level of B12 in the blood
Patient picks for Anaemia Allergies, blood and immune system Macrocytosis and macrocytic anaemia Macrocytosis refers to red blood cells which are larger than normal
Taking the diabetic medication, Metformin, is associated with a higher risk for Vitamin B12 deficiency
Following that, the frequency changes based on your response
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