Lightens teeth without peroxide while helping to prevent cavities. Recommendations Adults and children 2 years of age and older: brush teeth thoroughly, preferably after each meal, at least twice a day or as directed by a dentist or physician. Instruct children under 6 years of age in good brushing and rinsing habits (to minimize swallowing). Supervise children as necessary until capable of using without supervision. Children under 2 years of age: consult a dentist or doctor.