Fluoride Is Backed by Science—But Supply Disruptions Raise New Concerns

Fluoride Is Backed by Science

A major long-term study published in the Proceedings of the National Academy of Sciences delivers some of the strongest evidence to date confirming that community water fluoridation is safe, particularly when it comes to brain health. The research, led by Rob Warren at the University of Minnesota, analyzed data from over 10,000 participants tracked across decades as part of the Wisconsin Longitudinal Study.

The findings were consistent and reassuring: individuals who grew up in fluoridated communities showed no differences in intelligence or cognitive function compared to those who did not. This held true from adolescence through late adulthood.

For those of us in dentistry, this reinforces what we’ve known for years—at recommended levels, fluoride is both safe and highly effective in preventing dental caries. Much of the lingering concern around fluoride and IQ has been fueled by studies conducted in areas with fluoride levels far exceeding those used in the United States, leading to confusion and misinformation.

Yet despite the strength of the evidence, skepticism persists. We’re seeing growing patient hesitancy and even legislative efforts aimed at banning water fluoridation in certain regions. This widening gap between science and public perception puts added responsibility on dental professionals to educate patients and advocate for preventive care.

At the same time, a new challenge is emerging—one that has nothing to do with safety, but everything to do with access.

Global supply chain disruptions, partly tied to geopolitical tensions involving Iran, are beginning to impact the availability of fluoride compounds used in water treatment. While these shortages are expected to be temporary, they expose a vulnerability in a system that millions rely on for baseline oral health protection.

The takeaway is simple: the science supporting fluoride is solid. The challenge now is maintaining both public trust and consistent access in an increasingly uncertain global landscape.

About the Author

Dr. Jin Eslami, DDS, MS, is a board-certified periodontist with over 30 years of experience in periodontal disease treatment, dental implants, and advanced bone regeneration. Based in Rancho Santa Margarita, she specializes in complex cases involving severe gum disease and full-arch implant rehabilitation. Dr. Eslami is a strong advocate for the connection between oral health and systemic conditions, including cardiovascular disease and cancer.

To learn more or schedule a consultation, contact Dr. Eslami’s office for expert periodontal and implant care.
Orange County Oral Surgery & Periodontics
Phone : 949-888-0332
Website: https://www.ocosperio.com/