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B12 deficiency: The scandal over injections during Covid Why Do I Feel Worse After My B12 Injection 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 Compounded Cyanocobalamin (Vitamin B12) Injection Empower Signs and Symptoms of Vitamin B12 Deficiency
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