believe it or not you can actually take too many vitamins and they can build up in your body and cause toxicity. this can happen with the "fat soluble" vitamins which include vitamins a d e and k. you definitely want to be careful with your daily dosage and make sure that your health-care provider (they may run blood work periodically) and pharmacist know about everything you are taking.
can i take too many vitamins? if so what can happen?