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Vitamin B12 Deficiency: Causes, Symptoms, and Treatment What Does A Vitamin B12 Injection Do Vitamin B12 shots: Uses, benefits, and side effects I've had a migraine since Sept 4th. I took a B12 injection that day (prescribed by my doctor) so I'm wondering if it's related or coincidence. I'm scared to take another one Vitamin B12 Injections: Vital Therapy for Pernicious Anemia
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