The present invention relates to an oral care dye composition for detection of
demineralization lesions comprising: a first phase (or first composition) comprising from about 0.1% to about 10% by weight of the composition of a
blue dye and mixtures thereof; a second phase (or second composition) comprising from about 0.1% to about 10% by weight of the composition of a red dye or a
yellow dye or mixtures thereof; a safe and effective amount of a
solvent wherein the dye is soluble in the
solvent; and optionally a safe and effective amount of a
flavor; wherein the composition is effective for detection of demineralized lesions. The present invention further relates to method of visually highlighting
demineralization lesions, in tooth surfaces, or a method of detecting the mineralization health of teeth, wherein the above dye composition is applied to the
oral cavity or to the teeth, of a human or
animal subject, in need thereof. In one embodiment a first dye composition and a second dye composition are applied, sequentially, to a human or
animal subject's
oral cavity or teeth, in need thereof, wherein after the dye compositions are applied, the teeth are visually observed to assess demineralized lesions stained by the dyes.