Track the number of vitamins and minerals you take. If you're a person that takes a lot of supplements, you could be getting too much of certain vitamins or minerals. This is usually the case with fat-soluble vitamins like K, D, A, and E. If the risks worry you or if you take prescriptions, you should talk to a physician.

Always tell your doctor if you are taking vitamin or mineral supplements when you are prescribed medication. Some prescribed drugs interact with certain vitamins, which can lessen or increase the effectiveness of the drug. This can have negative consequences on your body if you do not inform your doctor of supplements you are taking beforehand.

Are you a woman of childbearing age? If so, you may be low in magnesium. In fact, 60 percent of women or more may be deficient in magnesium. Your best bet is to talk to your doctor about having tests done to measure your levels, and if you are low, pick up a supplement.