selenium (element)

A selenium element, represented by the symbol "Se," is a non-metal mineral essential for some biological functions. It is found naturally in soil, water, and certain foods, playing a key role in the body’s antioxidant systems that protect cells from damage. Selenium helps support the immune system and thyroid function. While it's important in small amounts, excessive intake can be harmful. In industry, selenium is used in electronics, glassmaking, and solar cells. Overall, selenium is a vital, naturally occurring element with significant biological and industrial applications.