Regular yogurt use reduces a child's risk of tooth decay, a new study has found. Previously, researchers have suggested that yogurt can prevent tooth decay in children, and studies have shown that butter, cheese and milk have no significant effect on preventing tooth decay. Although drinking more yogurt has a protective effect on children's teeth, the reasons why yogurt can reduce the risk of tooth decay remain unclear. One theory is that the protein in yogurt is attached to the surface of the tooth. This prevents harmful acids from eroding teeth.
The option that 'Studies have shown that children who use yogurt at least four times a week can reduce the incidence of tooth decay by 15%' best supports the findings of this study.