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It's safe to state that most Americans don't get enough of the recommended vitamins each day. In addition to eating a healthy, balanced diet full of fresh fruits, vegetables, lean meats, low-fat dairy and healthy oils, a vitamin supplement can be good insurance to getting the nutrients you need.

Vitamin A: When we think of vitamin A, we think of the vitamin that helps us see in the dark. In addition, it is responsible for the healthy production of white blood cells, bone health and the lining of the body's interior surfaces. Vitamin A can readily be found in many foods, such as breakfast cereal, juices, dairy products and orange vegetables with beta-carotene. When taking a supplement, the Institute of Medicine recommends 3,000 IU a day for men and 2,333 IU for women. While it's important to get enough vitamin A, too much of a good thing can lead to hip...