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Vitamin B12 Side Effects: Risks of Excess Intake 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 What You Need to Know About Vitamin B12 Duane NP Why Do I Feel Worse After My B12 Injection? Causes & Management Bolt Pharmacy
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