WHO warns of fluoride risks: How excess use can harm your child’ health and IQ

By Admin

23 Mar, 2026

Fluoride is widely known for its role in preventing tooth decay and strengthening enamel. Found almost everywhere in the environment, this inorganic substance is commonly used in toothpaste, mouthwashes, drinking water fluoridation, and dental treatments. While fluoride is beneficial in optimal amounts, health experts warn that excessive intake especially in children can lead to serious and sometimes irreversible health consequences, including effects on oral health, bones, and even intelligence levels.

Why Fluoride Matters   And When It Becomes Risky

Fluoride toothpaste is highly effective in preventing cavities and strengthening enamel. It increases resistance to acid attacks, reducing the chances of tooth decay. However, children often swallow toothpaste due to its pleasant taste, which may lead to excessive fluoride intake. While controlled exposure supports dental health, overexposure may cause long-term damage.

According to health experts, excessive fluoride exposure can contribute to dental fluorosis (discoloration and damage to teeth), skeletal fluorosis, osteosclerosis, calcification of tendons and ligaments, and bone deformities. These risks become more significant when fluoride intake comes from multiple sources, including drinking water, dental products, and food.

Findings From Global Health Reports

Health reports highlight the widespread prevalence of dental problems. Approximately 2.4 billion people globally suffer from caries of permanent teeth, while 486 million children experience caries of primary teeth. Adequate fluoride intake in regions lacking fluoride can help reduce tooth decay. Experts recommend dental products containing fluoride, fluoridated drinking water, and a low-sugar diet to improve oral health.

However, excessive fluoride consumption often occurs in regions with high fluoride levels in groundwater. This situation is particularly common in warm regions, including parts of India. Millions of dental and skeletal fluorosis cases have been reported worldwide due to high fluoride concentrations in drinking water.

Impact on Children’s Intelligence

Research suggests that excessive fluoride intake may affect neurological development in children. Studies indicate that fluoride is considered a developmental neurotoxicant that can reduce intelligence levels in children. Some reports categorize fluoride alongside toxic metals such as lead, methylmercury, and arsenic due to its potential neurological impact.

Because of these risks, children under six years of age should avoid using fluoride-containing mouthwash unless recommended by a dentist. Additionally, adults should supervise children while brushing to ensure they do not swallow toothpaste.

Where Fluoride Is Found

Fluoride is present in various dental and non-dental sources, including:

• Toothpaste, gels, mouthwashes, and floss

• Dental cements and fillings

• Fluoride supplements

• Drinking water (especially groundwater)

• Food and beverages prepared with fluoridated water

• Certain medications containing perfluorinated compounds

• Waterproof and stain-resistant products

• Some pesticides and treated foods

Fluoride naturally occurs in minerals such as fluorite, particularly calcium fluoride (CaF₂). Fluoride salts like calcium fluoride and sodium fluoride dissolve easily in water, which is why fluoride is commonly found in groundwater. Regions in southern Asia, eastern Brazil, and parts of Africa often have naturally high fluoride concentrations in drinking water.

How Parents Can Protect Their Children

Parents can reduce fluoride-related risks by taking simple precautions:

• Use only a pea-sized amount of toothpaste for children

• Supervise brushing to prevent swallowing toothpaste

• Avoid fluoride mouthwash for children under six unless advised

• Check fluoride levels in drinking water

• Avoid unnecessary fluoride supplements

• Encourage rinsing and spitting after brushing

The Bottom Line

Fluoride plays an important role in preventing tooth decay and maintaining oral health, but balance is key. While insufficient fluoride increases cavity risk, excessive exposure can lead to dental, skeletal, and neurological complications especially in children. Monitoring fluoride intake from all sources and practicing safe dental habits can help ensure children receive the benefits without the risks.