Selenium is a trace mineral with powerful antioxidant properties, playing a critical role in maintaining overall health. The recommended daily allowance for selenium varies by age and gender. Selenium's main function is to protect cells and tissues from oxidative damage, which helps reduce the risk of chronic diseases. It supports the immune system and thyroid function, contributing to overall well-being. Deficiencies in selenium can lead to various health issues, but adequate intake is essential for optimal health and protection against oxidative stress. Recognizing the importance of selenium in antioxidant defense, immune support, and overall vitality underscores its role in maintaining health and a balanced diet.