The supplied Health Supplement D-Biotin L-Cysteine Nicotinamide And Selenium Tablets that contain Selenium is used to treat or prevent selenium deficiency. Selenium has been used in alternative medicine as an aid to treat Hashimoto 's thyroiditis (an autoimmune disorder of the thyroid), and to treat high cholesterol. Selenium has antioxidant properties and may help protect cells from damage. The offered Health Supplement D-Biotin L-Cysteine Nicotinamide And Selenium Tablets are very safe and made for use in treatment of various ailments.