Dr. Oz says taking a full multivitamin in one dose is like over-filling your tank. "You want to give your body the right amount of fuel for when you need it. Vitamins have water soluble elements to them so they are quickly moved through your system."
If you're confused about which multivitamin is right for you depending on your age and sex, Dr. Oz says to keep it simple. "Everyone takes the basic same multivitamin with two small exceptions," he says. Pre-menopausal women should take a multivitamin with iron in it and 5,000 units of vitamin A. Men and post-menopausal women can take a basic multivitamin with 2,500 units of vitamin A.
When taking your daily vitamins, Dr. Oz says to make sure to get plenty of fluids. "Wash them down, especially the aspirin," he says. "If you don't like taking the pills, you can get liquid vitamins. They work as well. Find something that agrees with you that you can automatically make part of everyday life for you."
Need an age-specific guide to vitamins? Print Dr. Oz's vitamin checklist for your age group.