“The purpose was to study differences in the caries increment rate as influenced by various sugars…The results showed a massive reduction of the caries increment in relation to xylitol consumption.”
Scheinin, A., Mäkinen, K. K., & Ylitalo, K. (1976). Turku sugar studies. V. Final report on the effect of sucrose, fructose and xylitol diets on the caries incidence in man. Acta Odontologica Scandinavica, 34(4), 179–216.