b12 deficiency injections side effects Injection Effects: What to Expect What Does a B12 Shot

Remove the cap and seal on the vial

Once the vitamin B12 reserves reach their normal levels, the injection of vitamin B12 will be needed as maintenance shot once every one to three months to prevent any of the symptoms of deficiency from returning

You may feel more energetic after a shot, which can lead to small behavior-driven changes like being more active, but the injections themselves are not a proven method to burn fat in people who are not deficient

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