Selenium is an essential trace mineral and functions as part of the antioxidant enzyme glutathione perioxidase. It is bonded to the essential sulfur amino acid, methionine, in a naturally occuring form as found in the diet. Selenium can help form selenoproteins, which have a role in regulating inflammation and immune resonses. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 2000, the NOW brand has been supporting Canadians with a mission to provide products that empower people to lead healthier lives. 70% of the NOW products in Canada are made or packaged in Guelph, Ontario, employing hundreds of Canadians from coast to coast. NOW performs 31,000 quality tests every month to ensure you get the highest quality supplements at the best price possible. Our promise - what is on the label, is precisely what is in the bottle.