Unlike some denture adhesives, Effergrip Denture Adhesive does not contain zinc. High concentrations of zinc have been shown to have health risks. What Effergrip Denture Adhesive does have is an extra strong adhesive for a powerful grip. You'll feel confident your dentures won't slip even when eating something that requires a lot of pressure. Effergrip Denture Adhesive stands strong! Unlike some denture adhesives, Effergrip Denture Adhesive DOES NOT contain zinc. Its ZINC FREE and safe to use. Effergrip Denture Adhesive has an extra strong adhesive for a powerful grip. You'll feel confident your dentures won't slip even when eating something that requires a lot of pressure. Effergrip Denture Adhesive carries the American Dental Association's seal of acceptance.