Oral B12 vitamins rely on your stomachs acidity and intrinsic factor for absorption, which can be variableespecially if you have gut issues or take acid-blocking medications
Side effects are usually minor, but if your ankles start to swell or you have an allergic reaction or trouble breathing, call your doctor
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Also, individuals who have undergone certain surgical procedures, including intestinal resection, bypass, or bariatric surgery, which may reduce Vitamin B12 absorption, are also eligible
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