b12 injections with normal b12 levels

Size:1000 mcg/ml - 30 ml x 3 Serious B12 deficiency may cause anemia and nerve damage American Regent Do vitamin B12 injections cause nausea and headaches? https://i.etsystatic.com/49378383/r/il/3145d5/6212589831/il_fullxfull.6212589831_isb3.jpg

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