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how often should i give myself b12 injections You Get Vitamin Injections? B12 Injection Dosage and Frequency:
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Severe allergic reactions to B12 shots are uncommon but can happen
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Polymorphisms in various genes involved in vitamin B 12 metabolism, including the genes encoding the intrinsic factor-cobalamin receptor (60) and the holo-transcobalamin receptor (61), have been associated with increased NTD risk in some studies