It has been demonstrated that there is a direct relationship between trace mineral nutrition and immunity, disease resistance and reproduction. It provides highly bioavailable and cost-effective organic trace minerals for animal nutrition. These molecules are mineral amino acid chelates, resulting from the reaction of a metal ion from a soluble metal salt with a specific aminoacid. In order to feed animals efficiently, the use of organic (chelated) minerals is recommended, and a combination of chelated copper and zinc would be of interest.