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Refrigerating an unopened vial won't hurt it, but it's not required

B12 overdose symptoms include skin rashes, itching, upset stomach (nausea, vomiting, diarrhea), b12 overdose headache, and feeling anxious or nervous

Each vial contains 10 mg for laboratory research use

Several factors affect how often B12 injections are needed: The severity of the initial deficiency The presence of neurological symptoms Underlying health conditions affecting B12 absorption The patients response to initial therapy Ongoing monitoring of serum B12 levels By customizing the injection frequency for each patient, we make B12 therapy more effective