This document discusses copper's important role in the chain of life as a mineral that is critical for many chemical reactions in the body. It notes that copper must be obtained through diet as the body cannot synthesize it. The document provides examples of copper-rich foods like leafy greens, seafood, nuts and dried fruits. It also discusses copper's role in producing red blood cells and maintaining nerve cells and the immune system. Too little or too much copper can impact health, so a balanced diet is recommended to obtain the right amount.