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boots vitamin b12 injection Best supplements 2026: reviewed by nutrition experts 12 deficiency B12 Shot | The IV
Description
Neuropsychiatric manifestations such as mood lability, aggression, or depression have been documented, underscoring the need for mental-health screening

Injection Technique General subcutaneous guidance from clinical bestpractice resources [7]

Serious adverse effects have not been widely reported, but long-term safety data in humans is lacking

I'm assuming your GP has asked questions about your diet