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Note that your blood B12 levels will often normalize before your physical symptoms fully disappear
After that, you may shift to once-a-week injections for one to two months, and then to monthly injections
In deficiency, the body makes abnormally large, inefficient cells (megaloblastic anemia)
Hair, skin, and nails: B12 supports cell reproduction, so hair, skin, and nail health can suffer when levels are low
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