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As a result, there are many questions surrounding human relevance, effectiveness, and broader biological significance within the scientific community

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Side effects to tell your doctor about immediately are skin rashes, itching, hives, swelling of the tongue, lips, or face, blueish skin, chest tightness or pain, trouble breathing, wheezing, dizziness, or red, swollen, painful area on a leg (via the Cleveland Clinic)

Importantly, it remains unclear whether the disease process itself may contribute to elevated vitamin B12 levels