BioCare Selenium supplements provides L-selenomethionine,a highly absorbable and bioavailable combination of selenium and l-methionine. Selenium is an important antioxidant which contributes to cell protection against oxidative stress and normal thyroid function. L-Selenomethionine is also the most common form of selenium most found in nature. It is especially effective in the activation of Vitamin E and the production of prostaglandin, which helps support hormone balance. This product is suitable for vegetarians and vegans.