B12 Injection Frequency: How Often Should You Get a B12 Shot? Liv Hospital 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 How Often Should You Get B12 Injections? Infusion For Health Too Much Vitamin B12: Risks, Symptoms and When to Seek Help Bolt Pharmacy Pernicious Anemia: Definition, Symptoms, Causes & Treatment