While brushing your teeth protective film particles will be loaded on the teeth surface. These particles will influence the binding properties of dark stains and form a protective shield on the enamel. iWhite Dark Stains Toothpaste is the perfect partner for everyday whitening and dental care. Use the toothpaste in combination with the iWhite Dark Stains Toothbrush and the iWhite Dark Stains Teeth Whitening kit for long lasting whitening results