A review of the science around the fluoridation of public water supplies has reaffirmed the belief that the levels of the chemical used in New Zealand's water systems does not pose a risk to health.
The issue of whether or not to allow fluoride into the country's water supplies has caused significant debate in many regions, with opponents arguing the negative health effects outweigh the protection it provides against tooth decay.
However, the report, which was compiled by five experts, explored claims that the chemical can contribute to the risk of cancer, brain disorders and other illnesses but concluded there was no scientific evidence to back these up.
"The review finds compelling evidence that fluoridation of the water at the established and recommended levels produces broad and continuing benefits for the dental health of New Zealanders," says Sir Peter Gluckman, the Prime Minister's Chief Science Advisor.
Mr Gluckman helped to commission the review with the Royal Society of New Zealand.
"The public can be reassured on the basis of robust scientific data, that the implementation of this public health measure poses no risk of adverse health effects."