Taken in supplement form and particularly when a person has a deficiency, certain trace minerals can aid in growth and development. Some promote the formation strong bones and connective tissues, and help to prevent the bone-thinning disease known as osteoporosis. This strengthening property also protects against strains and sprains. In addition, certain trace minerals are being investigated for their potential to guard against heart disease and control seizures, among other actions. Fluoride is perhaps the best-known trace mineral because of its highly publicized role in keeping teeth strong.
Trace minerals can be found in many multivitamin and mineral supplements, as well as bone-building formulas. However, the typical American diet contains most of the necessary trace minerals, so there is no need for the majority of the population to take individual supplements. No RDA has been established for many of these nutrients because there is not yet enough scientific evidence to establish a requirement. However, animal studies have found that low levels of manganese, silicon, and vanadium can hinder growth and development, cause imbalances in cholesterol levels, and lead to problems making insulin. In addition, a deficiency in fluoride contributes to cavities, and too little boron may weaken bones.
Manufacturers' claims to the contrary, it's not known whether one form of a supplement containing trace elements is better absorbed than another.
