Multi-Element Buffered C PowderItem Description Vitamin C is important for immune function and antioxidant protection, as well as collagen and connective tissue production.* Multi Element Buffered C adds calcium, magnesium, and potassium to ascorbic acid to create a buffered product that is gentle on the stomach. This formulation includes zinc, manganese, and copper in well utilized forms. Quercetin, a powerful bioflavonoid, and reduced L glutathione, an antioxidant, are included