b12 injections safe in pregnancy are during The Advantages of B12 Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine are b12 injections safe during
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Usually, doses are between 1,000 to 2,500 mcg per shot

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In Warren MJ, Smith (eds.)

Chronic myelogenous leukemia, promyelocytic leukemia, polycythemia vera and hypereosinophilic syndrome have all been associated with high B12 levels (25)
