Vitamin B12 (cobalamin) and folate (vitamin B9) are vitamins that serve important functions in the human body. Folate is needed for development and growth of cells (including red blood cells) and synthesis 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 Intramuscular Injection (IM) OSCE Guide IM Injection Geeky Medics Will my B12 Injection Work Right Away? About Face Anti Aging Vitamin B12 Injections Energy Boost The Center Medical