The findings of the three dental examinations in a year during which experimental groups from 425 children living in orphanages received vitamin D (Zucker concentrate) in evaporated and dairy milk were statistically analyzed by E. B. Phelps, and showed that a nutritional control of dental caries is possible. The clinical observations pointed to a probable correlation of the degree of such control with the quantitative dosage of vitamin D. The greatest protection was observed in the 300 unit group; the differences in the degree of protection observed in the groups receiving 150 units, 100 units, plain milk, and the controls were not conspicuous.