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Vitamin B12 levels low? My patient would get a headache every morning, not knowing it was a red flag for deficiency 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 B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B12 Injection Side Effects and Safety How Quickly Does a B12 Shot Work? Benefits & What to Expect
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