<；P>；PROBLEM TO BE SOLVED: To provide a more useful anti-caries agent excellent in bio-compatibility, having no problem in safety, and also having an excellent anti-caries property, a composition for an oral cavity containing the anti-caries agent, and a food for progression-inhibiting and/or preventing the caries containing an active ingredient of such the anti-caries agent. <；P>；SOLUTION: This anti-caries agent contains 1,5-D-anhydroglucitol expressed by formula (I) [wherein R is H, a sugar, or fatty acid, provided that all of the Rs are each the same or different] or its derivatives. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
