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Seeing results from vitamin B12 can take weeks to months
Risk of Allergic Reactions and Contamination risk-of-allergic-reactions-and-contamination IV and IM injections carry inherent risks, such as anaphylaxis, contamination during preparation, and injection site infections
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New Vitamin B12 Test Who should get tested for vitamin B12 (cobalamin) deficiency, and which is the best test
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