Vitamins aren't all that good for you unless you have a disease or something and need em. If you eat a balanced diet in terms of food, such as including poultry, fish, steak, and vegetables combined with some fruits you should be good. Vitamin overdoes really doesn't do much, but it is not recommendable. Vitamins are required by your body to produce certain proteins and for the correct function of certain enzymes. Consult your doctor if you believe you or a loved one has a vitamin deficiency.