The Canadian penny may be obsolete, but copper continues to be a very valuable mineral. In fact, it’s essential to human health. To the detriment of many individuals the importance of copper has been overlooked and overshadowed by its antagonist, zinc. When we supplement large doses of zinc (i.e. 50 mg or higher) in the interest of supporting a health condition, it competes with dietary copper for uptake into the bloodstream and can result in copper deficiency. This can affect oxygen utilization, immune function, repair and maintenance of connective tissue, and more.