bruising from b12 injection Why do I feel worse after a injection? can b12 injections cause bruising

If you do need to get vitamin B12 to help keep you healthy, you may worry there are going to be a number of side effects that you need to deal with

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Other Health Factors: Our providers assess any coexisting medical conditions, medications you may be taking (such as metformin or acid-reducing drugs), and your overall nutritional status, as these can influence how often injections are needed

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