Gluten-free, vegan and GMO-free Selenium 200 mcg by Klean Labs is a high-quality dietary supplement that provides 200 g of pure selenium per capsule. As an essential trace element, selenium is essential for numerous important functions in the body, and our capsules offer a convenient way to meet your needs. With a formulation of sodium selenite, which has a high bioavailability, we enable efficient absorption. This carefully manufactured supplement is gluten-free, vegan and GMO-free, and is subject to strict quality controls to ensure purity. Selenium not only contributes to the maintenance of normal nails and hair, but also to the normal function of the immune system and the protection of cells from oxidative stress. How to use : Take one capsule daily with a meal and plenty of liquid.