Vitamin B12 is beneficial in the formation and renewal of healthy red blood cells, in the good maintenance of the nervous system and in the proper use of fats, carbohydrates and proteins by the body. It is also useful in the development of children and in increasing their appetite. Research is underway on the usefulness of vitamin B12 in improving balance, concentration, memory and reducing aggression. Vitamin B12 may be absent in a vegetarian diet, because it is only found in meat products, so a daily B12 supplement is recommended.