− | Copper has many physiological functions. It is an '''essential component of a number of enzymes that catalyse oxidation reactions'''. It is also involved in '''iron metabolism, energy metabolism''' and the '''formation of normal hair colour'''. | + | Copper has many physiological functions. It is an '''essential component of a number of enzymes that catalyse oxidation reactions'''. It is also involved in '''iron metabolism, energy metabolism''' and the '''formation of normal [[Hair - Anatomy & Physiology|hair]] colour'''. |