what is normal dose of b12 injection Shots at Home: How, Where & How Often to Inject Yourself B12 Injection Dosage and Frequency:
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Pain behind ears and base of skull, not much in brows or temples
[1] These effects are typically dose-dependent, most pronounced during dose escalation, and tend to diminish over time

Now, invert the vial and pull the plunger back slowly, drawing your desired amount of Bac water (e.g., 2mL) into the syringe