How does selenium contribute to immune function?

Selenium plays a crucial role in enhancing antioxidant defenses, which is vital for maintaining optimal immune function. As a component of selenoproteins, selenium helps produce enzymes like glutathione peroxidase, which protect cells from oxidative damage caused by free radicals. This antioxidant activity is essential for safeguarding immune cells and ensuring they can function effectively. When the body is under oxidative stress, the immune system can be compromised, leading to increased susceptibility to infections and diseases. By bolstering the body's defense system against such oxidative stress, selenium helps to maintain a robust and efficient immune response. Thus, its contribution to enhancing antioxidant defenses is a key aspect of how it supports immune function.