Colgate optic white with charcoal toothpaste is a stain removal whitening toothpaste with micro-polishing action to remove 5x more surface stains. This colgate optic white toothpaste contains clinically proven technology that safely removes surface stains and helps prevent new stains from forming, so your teeth stay whiter longer. vs. Ordinary non whitening toothpaste, after 2 weeks of continued use