The invention provides a foamable composition for tooth bleaching which can be a one- or two-component system. The system has at least one peroxide compound, and at least one foaming agent. The composition can also contain at least one source of calcium, strontium and mixtures thereof, at least one de-sensitizing agent and at least one source of phosphate. The composition can produce a longer-lasting, collapsible foam structure with enhanced whitening action. The foamable composition can also be a one-component multi-phase system. A two-component composition can be packed in a two-compartment syringe. The syringe can also be fitted with a dispensing tip which may or may not have a static mixer.
