NutraBio uses Albion Minerals Manganese Glycinate Chelate an advanced, more bioavailable and patented form of the essential mineral manganese. While most manganese supplements aren't easily absorbed and cause gastric upset, Albion manganese is chelated with the amino acid glycine to produce small, organic molecules that pass easily through the digestive tract and are gentler on the digestive system. Manganese is an essential trace mineral involved in many key functions in the body. It plays a role in energy production, normal bone formation and development, and the synthesis of many vital cellular biochemicals. One of these biochemicals is mitochondrial superoxide dismutase, an antioxidant that helps protect the mitochondria of each cell.*