Pure® Encapsulations Selenium provides a significant amount of L-selenomethionine (selenium chelated with synthetic methionine), the body's store form of selenium. Selenium protects against oxidative damage and supports the immune system. It also maintains normal hair and nails, contributes to normal thyroid function, and spermatogenesis. Directions: People who want to strengthen their immune system or fertility. How to use: 1 capsule with food. Caution: If you are pregnant, breastfeeding, have any health conditions, or are taking any medications, consult your healthcare professional before using this supplement. Conservation: Store in a cool, dry place.