Crest 3D White Whitestrips products should not be used by children under the age of 12. Crest further recommends that its Crest Whitestrips Supreme, which are only available from dental professionals, not be used on anyone under the age of 18.
Some dentists recommend that it is unwise to whiten the teeth before the enamel on the permanent teeth completely matures, which takes two to three years after the initial eruption of the tooth, commonly around 11 to 13 years of age. Cooperation is needed to complete the whitening process, which depends on the individual child and supervision of the parents. Some dentists do not even discuss teeth whitening procedures unless other criteria are met first, regardless of age.