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Compounded Cyanocobalamin (Vitamin B12) Injection Empower Why do I feel worse after a B12 injection: causes explained Why Do I Feel Worse After My B12 Injection? Understanding Post Injecti Oxford Origins Vitamin B12 Side Effects Why do I feel worse after a B12 injection? CoLaz 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
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