b12 shots injection site How to Use These 4 IM Spots Safely Best Vitamin B12 Injection Sites?

Taking cyanocobalamin if you have a methylation issue or MTHFR defect (3) in your genes can also cause issues as your body attempts to methylate the B12 before it can utilize it completely

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Its well-tolerated

These could include symptoms such as itching, a rash/hives, swelling especially around the face or throat, or difficulty breathing

Unlike other vitamins, the absorption of vitamin B12 depends on a protein produced in your stomach, called the intrinsic factor