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can a b12 injection give you a headache Vitamin Deficiency Weird Symptoms – Part 2 (Types of Headaches, Gastrointestinal and Others) Hydroxocobalamin (Vitamin B12): Uses, Alternatives,
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PMID:34368359 Kannt A, et al
It may also be used to treat other conditions, such as pernicious anemia, vitamin B12 malabsorption, and certain types of nerve pain

Medical Condition Adjustments: The Sixth Key Guideline Adjusting B12 doses is key for people with health issues that affect how nutrients are absorbed

Monitor for any irritation or adverse reactions

Your provider will set realistic expectations based on your labs
