Instant Whitening Effect The formula contains clinically proven optic brighteners Brushing activates them to generate a blue foam that provides a temporary effect Leaving your teeth looking whiter right after brushing Directions for use: Brush teeth for 2 minutes, 3 times daily. Children 6 years and younger should only use a pea sized amount, and be supervised by an adult to minimize swallowing. In case of intake of fluoride from other sources consult a dentist or doctor. Colgate optic white, Colgate optic white instant whiteness, Colgate toothpaste whitening, Colgate optic toothpaste, best whitening toothpaste, Colgate oral products, Colgate toothpaste products, Colgate toothpaste, Colgate optic, optic white toothpaste, Colgate optic instant whitening effect