Metabolic Maintenance Selenium 200 mcg has been discontinued by the manufacturer. Selenium is required to produce glutathione and helps with immune system function. Selenium is a trace mineral that is incorporated into important antioxidant enzymes. These enzymes aid the body in fighting cellular damage from free radicals. Metabolic Maintenance's selenium is in the amino acid form L-selenomethionine, which research indicates is better absorbed and more bioavailable compared to other forms of selenium. Potent mineral antioxidant Valuable cofactor in detoxification pathways Nourishes and protects the immune system Ingredients Serving Size: 1 Capsule Amount/Serving Vitamin C (as Ascorbic Acid and Ascorbyl Palmitate) 250 mg Selenium (as L-Selenomethione) 200 mcg Other Ingredients: Vegetarian cellulose capsule, L-leucine. Egg Free. Gluten Free. Dairy Free. Free of Nuts. Suggested Use One (1) capsule daily with a meal, or as directed by a healthcare professional. Caution: Pregnant or lactating women, consult your healthcare professional before taking this product. Keep tightly closed in a cool, dry place, out of the reach of children.