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Updated: Mar 28, 2026

Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products
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Caution needed in altering the 'optimum' fluoride concentration in drinking water.

A John Spencer1, Loc G Do1

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Summary

The US Public Health Service

Keywords:
cariesdental healthfluoridefluorosispublic health policywater fluoridation

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Area of Science:

  • Public Health Policy
  • Dental Public Health
  • Environmental Health

Background:

  • Community water fluoridation is a key public health measure for preventing dental caries.
  • The US Department of Health and Human Services updated its recommendation for optimal fluoride concentration in 2015.
  • The 2015 recommendation suggests 0.7 mg/l of fluoride (F) to balance caries prevention and fluorosis risk.

Purpose of the Study:

  • To critically evaluate the evidence and rationale behind the 2015 US Public Health Service recommendation on community water fluoridation.
  • To argue for greater caution and more comprehensive research before altering fluoride concentration guidelines.
  • To highlight the need for updated data and broader policy considerations in water fluoridation recommendations.

Main Methods:

  • Review and critique of the evidence base used by the Federal Panel on Community Water Fluoridation.
  • Identification of data gaps and methodological limitations in the panel's assessment.
  • Exploration of alternative policy directions from international literature.

Main Results:

  • The study identifies significant uncertainties and limitations in the evidence considered by the panel.
  • Key data on caries and fluorosis trends, risk attribution, and population impact were deemed insufficient.
  • The panel's rationale for reducing the optimal fluoride concentration is questioned due to these limitations.

Conclusions:

  • The 2015 recommendation to reduce fluoride concentration warrants further scrutiny due to insufficient evidence.
  • More up-to-date, comprehensive data and a wider range of policy options should inform future recommendations.
  • Public health policy requires careful monitoring and evidence-based adjustments to balance caries prevention and fluorosis risk effectively.