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Sixteen experienced anaphylaxis.March 30: Researchers publish a case study of a single patient in which they suspect the Pfizer vaccine may have caused a rheumatoid arthritis flare

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doctors and the general public

[1] Don't purchase over-the-counter B12 supplements without medical guidance, as this can interfere with accurate assessment and may mask underlying conditions

B-12 (cyanocobalamin) - Disease Interactions

Evidence and Guidance Many people wonder whether vitamin B12 supplements can cause joint aching or discomfort