Zinc is a metallic element found in the Earth’s crust and is the fourth most common metal in use, after iron, aluminum, and copper. It has numerous industrial and commercial uses, primarily in galvanizing and the production of brass. Zinc is also essential for human health, as it is a trace element required in small amounts for numerous biological processes. It is found in a variety of foods, including shellfish, red meat, beans, nuts, and fortified grain products.