Our Selenium Complex supplement contains 200mcg of Selenium per capsule along with 800mcg of Beta Carotene and essential vitamins such as Vitamin C (100mg), D3 (5mcg), and E (12mg) to support the normal function of the immune system and help protect cells from oxidative damage (claims as substantiated by EFSA). Selenium is a mineral that is vital to our health for a variety of body functions. While it primarily helps boost our immune system, it is needed for both normal thyroid function and normal fertility in men (spermatogenesis); as well as in the maintenance of normal hair and nails (claims are backed by EFSA).