Several articles published recently from this institution have dealt with the caries experience of diabetic children who were observed intermittently for long periods.1 Evidence has been offered to indicate the lessening of the progression of caries in these children through dietary means. The protective effect has been attributed to the completeness of the diet, without attempt to indicate the part which might be played by any single characteristic of the diet.
During the course of the reported studies a sharp break in dietetic policy was made, even though the nutritional characteristics of the diets were not changed notably either from a qualitative or from a quantitative standpoint. This change consisted of the replacement of the original high fat diets by diets which offered only half as much fat and twice the amount of carbohydrate. The study herein recorded was designed to determine whether such a change in diet was