abstract |
(57) [Summary] [Structure] At least one D-form selected from D-alanine, D-aspartic acid, D-glutamic acid, D-leucine, D-methionine, D-phenylalanine, D-serine and D-valine. An oral composition comprising 0.5% by weight or more of an amino acid. [Effect] It has excellent preventive and therapeutic effects on periodontal disease and has good safety. |