The best answer to that question is to eat lots of fruits and vegetables and make sure you go out into the sun about 15 minutes per day at least twice per week. Then you'll get everything you need. This notion we have that all will be well if we take supplemental vitamins in pill form is just incorrect. There are several websites (Harvard's being one) that explain how you can get all the vitamins you need based on how many calories you are consuming during the day.