Pure Encapsulations Selenium (selenomethionine) Supports Antioxidant Defenses, Immune Function, and Cellular Health Selenium is an essential cofactor for glutathione peroxidases, which maintain antioxidant defenses by inactivating hydrogen peroxide. Selenium also supports iodine metabolism to maintain healthy thyroid hormone production. This trace mineral is also involved in the production of certain prostaglandins that promote healthy blood flow. Selenium may also support healthy growth and fertility, as indicated in a research study using a combination of selenomethionine and vitamin E. Selenium also provides support for the immune system. Selenomethionine is an organic form of the mineral that occurs naturally in Brazil nuts and legumes, and consists of selenium bound to the amino acid methionine. During digestion, selenium is released from methionine. Selenium is absorbed primarily in the duodenum and proximal small intestine and transported to tissues via specialized transport proteins. Key Benefits and Features: Ages 18 and up Healthy cell function and immune health support Supports antioxidant defenses and cellular health Provides immune system support Promotes healthy blood flow May help support healthy growth and fertility Available in citrate and selenomethionine forms Made with high-quality vegan ingredients backed by verifiable science Ingredients Serving Size: 1 Vegetarian Capsule Amount/Serving Selenium (as selenomethionine) 200 mcg Other Ingredients: Hypoallergenic plant fiber (cellulose), vegetarian capsule (cellulose, water), and ascorbyl palmitate. Does Not Contain: Wheat, soy, dairy, eggs, artificial colors, artificial sweeteners, coatings, shellacs, GMOs, tree nuts, peanuts, sesame, unnecessary binders, fillers, preservatives, magnesium stearate, gluten, trans fat, and hydrogenated oils. Gluten Free, Non-GMO, Soy Free, Dairy Free, Vegetarian, Vegan Suggested Use As a dietary supplement, take 1 capsule daily, with a meal, or as directed by a health professional. Warning: If you are pregnant or lactating, have any health condition, or are taking any medication, consult your health professional before use. Storage: Store in a cool, dry place. More Info. Selenium is derived from sodium selenite Methionine (selenomethionine only) is derived from Homoserine, which is produced by organic chemical synthesis. Selenomethionine serves as a storage form. The methionine is incorporated directly into proteins, releasing selenium as they are catabolized Citrate (selenium citrate only) is derived from corn dextrose fermentation Ascorbyl palmitate (selenomethionine only) is derived from corn dextrose fermentation and palm oil Hypoallergenic plant fiber is derived from pine cellulose