About this item Optimally Absorbed: Well-absorbed form of an essential trace mineral Many Functions: Nutritional support for connective tissue, heart, skin, and nerve health* Balances Zinc: Supplement with zinc to prevent a deficiency of copper* Antioxidant: Essential component of the antioxidant superoxide dismutase Free From: Every Thorne product is made with the purest possible ingredients - without gluten or other major allergens (eggs, tree nuts, peanuts). This product also contains no soy, dairy, yeast, shellfish, or fish.