Glutathione Peroxidase is an important enzyme found in many organisms, including humans. It plays a crucial role in protecting cells from oxidative damage by catalyzing the reduction of hydrogen peroxide and other peroxides, using glutathione as a substrate. This process helps maintain cellular health and prevents damage to proteins, lipids, and DNA. The enzyme is part of the body's antioxidant defense system, which includes other components like superoxide dismutase and catalase. Glutathione Peroxidase is particularly significant in tissues that are exposed to high levels of oxidative stress, such as the liver and lungs, contributing to overall metabolic balance.