Expiration date: February, 2008. When used regularly, builds increasing protection against painful sensitivity of the teeth to cold, heat, acids, sweets or contact. Aids in the prevention of cavities. With regular brushing: fights cavities, freshens breath. Builds increasing protection against painful sensitivity. Soothes the nerves in your teeth where dentin is exposed. Original formula. Maximum strength. Soothing whitening mint. 4.1oz.