Fluoride: benefits and risks of exposure

Area of Science:

• Public Health
• Toxicology
• Dental Science

Background:

• Fluoride ingestion is a critical factor in dental health and carries potential risks.
• Understanding the benefits and risks of fluoride is essential for public health policy.
• Drinking water fluoridation is a widely implemented strategy for caries prevention.

Purpose of the Study:

• To summarize current scientific knowledge on the benefits and risks associated with fluoride ingestion.
• To evaluate the evidence regarding fluoride's impact on dental caries, fluorosis, and other health outcomes.
• To assess the safety of fluoride in drinking water at various concentrations.

Main Methods:

• Comprehensive review and synthesis of existing scientific literature and evidence.
• Analysis of epidemiological data on fluoride exposure and health effects.
• Evaluation of toxicological studies on fluoride's impact on human and animal health.

Main Results:

• Strong evidence supports fluoride's role in reducing dental caries incidence.
• Dental fluorosis prevalence varies with concentration; moderate fluorosis is observed at 1-2 mg/l.
• No evidence of skeletal fluorosis, cancer, or renal dysfunction in the general population at typical drinking water concentrations (up to 4-8 mg/l).

Conclusions:

• Fluoridated drinking water provides significant protection against dental caries.
• Dental fluorosis is a potential risk at higher fluoride concentrations, but its classification as an adverse effect is debated.
• Current evidence suggests fluoride in drinking water is safe for the general population regarding skeletal, renal, and carcinogenic effects.