Colgate Optic White Enamel White Whitening Toothpaste with hydrogen peroxide delivers 3 shades whiter teeth* and fortifies enamel. It is the only toothpaste with the whitening ingredient dentists use to remove surface and deeply set-in stains. The high fluoride formula fortifies enamels weak spots for a strong white smile. *Individual results may vary. With twice-daily brushing for 4 weeks.