The purpose of this study was to evaluate the bioflavonoids naringin on dental caries and periondontal disease in the albinorat. Twenty-five-day-old-male rats were fed the experimental diets for 42 days in this work at the end of the 42-day experimental period. The tooth surfaces were examined under a dissecting microscope. The sulcular caries lesions were recorded : the first molars were more affected than the second and third molars. Alveolar bone loss was measured on the buccal and lingual aspects of each molar: three site measurements (mesialpoint midpoint and distalpoint) were taken on the first molars. The results showed that the bioflavonoids, naringin had beneficial effects in the prevention of periodontal disease.