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A common protocol for patients with a B12 deficiency may be 1,000 mcg daily for one week, then the same dosage once weekly, and then the same dosage once per month after the deficiency has been addressed
Polycythemia vera Because B12 stimulates red blood cell production, injections could worsen this blood disorder
Lingering redness beyond the first week is also possible
What is the difference between cyanocobalamin and hydroxocobalamin
Therefore, proper medical assessment is essential before attributing nerve pain solely to vitamin B12 levels
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