size needle for b12 injection a Injection: A Simple Guide what size needle do you

However, supplementation should be approached with caution and must strictly follow a doctor's recommendations

When deficiency is diagnosed, lifelong B replacement is often required (especially in pernicious anemia)

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Treatment with cyanocobalamin or hydroxocobalamin may unmask this condition

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

Deep Subcutaneous Needles Deep SubQ needles are ideal for injections under the skin