Comvita Selenium contains 50mcg per tablet. The selenium in Comvita Selenium & Selenium ACE products is food form selenium, the most processable form available. Selenium is an essential trace element found in the sea & soil; however the concentration in many countries' soils is less than optimal for human health, thus requiring supplementation. Selenium helps to decrease the risk of cell damage attributed to free radicals. [I] Ingredients: Selenium (L-Selenomethionine), tableting aids, dicalcium phosphate.[/I]