Vitamin B12 Injection Dose for Adults: 7 Essential Dosage Facts & Schedules Liv Hospital B12 Injection Frequency: How Often Should You Get a B12 Shot? Liv Hospital B12 deficiency can damage your nervous system with a completely normal blood count. In a landmark NEJM study, 28% of patients with neuropsychiatric B12 damage had no anemia or macrocytosis. B12 runs If I took vitamin B12 injections and folic acid along with magnesium, a B complex, and carnitine, but there was no improvement and my condition actually worsened with increased anxiety, does this mean Self injecting vitamin B12. Quick and painless jabs after a B12 by Dr Caroline Palmer Medium Do You Need a Prescription for B12 Injections? OmegaQuant