Immune System Support: Naturally supporting immune system health, selenium may also play a key role in nutrient absorption for both men and women. BENEFITS AND USE - Take daily, or when you start to feel cold, to provide your body with the nutrients it needs to stay protected. This supplement supports skin health, core function, and circulatory support. Yeast-Free Essential Micronutrient Selenium Amino Acid Complex: Selenium is a natural micronutrient that plays an important role in many human body functions.