Along with other B vitamins, vitamin B12 is important for converting the food you eat into cellular energy.† Vitamin B12 is also important for proper red blood cell formation and normal function of the nervous system.† Vitamin B12 supplements may be important for vegetarians and vegans who avoid dietary sources rich in vitamin B12.† *Based on a survey of pharmacists who recommended vitamin and supplements. †These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.