Selenomax 200 mcg, dietary supplement, High Selenium Bound Yeast with B Vitamins. This product by Solaray is intended to provide selenium to Enhance support your normal, healthy body. Solaray has combined the same high selenium bound yeast that was used in a study that showed the health benefits of 200 mcg of selenium with naturally occurring B-Vitamins in Brewer’s Yeast to create this unique formulation.