Important Usage Information: Keep out of reach of young children. Not intended for use in children under the age of 12. Do not swallow plastic strip. Crest 3D Whitestrips is not a substitute for regular dental care. Visit your dentist regularly. Avoid contact of gel with eyes, cloth, leather, or fabric. Gel that comes into contact with the skin can cause temporary skin irritation and/or whitening. Tooth Sensitivity & Gum Discomfort: With all whitening products you may experience tooth sensitivity and/or gum discomfort. With products that provide a high level of whitening, such as Crest 3D White Whitestrips Luxe Glamorous White, there is a greater chance that you may experience tooth sensitivity and/or gum discomfort. These effects are generally mild. These effects are temporary and not harmful. If you are in need of dental work, have dental work, or have staining from medication, ask your dentist if whitening is appropriate. Crest 3D White Whitestrips Luxe Glamorous White are designed to hold well to teeth. Do not use on loose teeth, restorations, or braces. Crest 3D White Whitestrips will only whiten natural teeth. The strips will not whiten caps, crowns, veneers, fillings or dentures.