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 Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods 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 Vitamin B12 Deficiency: Signs, Symptoms, Reasons and Treatment Graphic Era Hospital