Crest Whitestrips Supreme has 100mg of gel with 14% hydrogen peroxide. Crest Whitestrips Supreme is the most effective of the Crest Whitening Strips. Use Crest Whitestrips Supreme as needed to maintain whiteness. If your teeth are significantly discolored, you may need to use 2 boxes of Crest Whitestrips Supreme initially to get the desired result.
Under the law, patients must be aged 18 or over. Although the GDC makes an exception for whitening the teeth of under-18s when used ‘wholly for the purpose of treating or preventing disease’.