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Individual results may vary, and all treatments are subject to medical evaluation and approval

As long as you are taking Bvitamins within recommended ranges, there is no evidence that they harm kidney function

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Common side effects of B12 injections These B12 effects tend to resolve on their own within a day or two: Injection site reaction, such as mild soreness, redness, or swelling Brief itching or warmth at the injection area A feeling of fullness or pressure in the muscle Mild headache or nausea shortly after the shot These reactions are typically related to the injection itself, not the vitamin