Solgar Selenium (Yeast-Free) 100µg Tablets (100). Solgar Selenium (Yeast-Free) 100 µg Tablets provides this vital mineral, in a 1-2 a day dose, and contributes to:. Normal spermatogenesis. Maintenance of normal hair. Maintenance of normal nails. Normal function of the immune system. Normal thyroid function. Protection of cells from oxidative stress