When you do a search on the Internet, there are abundant studies that suggest both for and against vitamins -- so what are we to make of all the results? Should we or should we not take multivitamins?

A heavy-duty mineral, iron is used to make red blood cells -- the oxygen transport system of the body. Too much or too little can be harmful to your health.

Whether you've tried one too many fad diets, have fallen off the bandwagon, or just want tips for lifetime weight management, you can clean up your diet with a few simple tweaks.

A multivitamin is very, very unlikely to kill anyone. If there is risk attached to the use of such supplements, it is very small. But there may be some risk -- and there is no reliable indication of benefit.

Do multivitamins cause breast cancer? An observational cohort study conducted in Sweden, recently published in the American Journal of Clinical Nutrition, suggests they may.

For years, Bayer has marketed its selenium supplements to men as a way to prevent prostate cancer. But the evidence that selenium prevents prostate cancer is as skimpy as Paris Hilton's bikini.