A study of 3,000 children in several countries showed that the vitamin was associated with a 50pc reduction in the incidence of tooth decay.
The children were given the vitamin through dietary supplements with cold-liver oil or other products containing Vitamin D or through the use of supplemental UV radiation.
They were aged between two and 16 years and the study was carried out by the University of Washington by Dr Philippe Hujoel.
“The findings from the University of Washington reaffirm the importance of vitamin D for dental health,” said Dr Michael Hollick, Professor of Medicine at the Boston University Medical Center.
“Children who are vitamin D deficient have poor and delayed teeth eruption and are prone to dental caries.”
Vitamin D levels in many populations are decreasing while dental caries levels in young children are increasing.
“Whether this is more than just a coincidence is open to debate,” Hujoel said. “In the meantime, pregnant women or young mothers can do little harm by realizing that vitamin D is essential to their offspring’s health.
“Vitamin D does lead to teeth and bones that are better mineralized.”