Brand from Japan: APAGARD. Contains a high amount of medicinal hydroxyapatite.Recommended for those who want to whiten their teeth.Active ingredient medicinal hydroxyapatite developed by Sangi is highly compounded.Medicated hydroxyapatite adsorbs and removes dental plaque, repairs (recrystallizes) invisible microscopic scratches on the enamel on the tooth surface.Replenishes (regenerates) minerals to mineral-deficient areas of teeth.Prevents cavities with 3 actions of calcification.A brightening prescription that combines medicinal hydroxyapatite and natural pearl ingredien