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Understanding why side effects occur (like hypoglycemia, weight gain, or GI issues) helps us make safer, smarter clinical decisions
This may help explain why it is little used by health professionals
Important safety information and common side effects The most common side effect of B12 injections is irritation at the injection site
Because this article has 16 major sections, scan the headings first and then use the FAQ or summary sections to pressure-test the answer
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