A two-component whitening system has a de-sensitizing effect as well as re-mineralizing capability. The system may be an unfoamed, a foamed or a foamablecomposition. The system has a first component with at least one peroxidecompound, at least one source of phosphate and at least one gelling agent； anda second component with at least one source of calcium, strontium and/ormixtures thereof. The second component may also contain at least one gellingagent, and the composition maybe present as a foam or is foamable. Thecomposition may be packed in a two-compartment syringe.
