Trace minerals, also known as trace elements or micro minerals, are minerals that are present in living tissues in small amounts. Some of them are known to be nutritionally essential, while others may be essential or nonessential. Trace minerals function primarily as catalysts in enzyme systems, and some metallic ions, such as iron and copper, participate in oxidation-reduction reactions in energy metabolism. Although trace minerals are needed in tiny doses, they are still crucial to our health and development. The recommended daily allowance for most trace minerals is between 0.2 and 15 milligrams. Some examples of trace minerals include iron, chromium, copper, zinc, iodine, manganese, and selenium. While we require macro minerals in large quantities, our bodies only require trace quantities of micro minerals. Trace minerals are not naturally produced by the body, so we must consume them through our diets. Although we can obtain enough trace minerals through our diets, healthcare providers may recommend a mineral supplement for those who are pregnant or breastfeeding, or those with unhealthy or restricted lifestyles.