Fluoride-free toothpaste gains traction as dentists debate its effectiveness
Hydroxyapatite products are rising in popularity, but experts say fluoride still has stronger scientific backing for preventing cavities.
By Ivan Dvorak ·
A growing number of patients are asking their dentists about fluoride-free toothpaste, creating a tension between consumer curiosity and established medical consensus. Dr. Jin-Ho Phark, an associate professor of clinical dentistry at the University of Southern California, reports hearing these inquiries regularly from both patients and students. The specific ingredient driving this trend is hydroxyapatite, a calcium phosphate mineral that some consumers see as a viable alternative to the standard fluoride formula.
Fluoride toothpaste became the standard of care in the late 1950s after Procter & Gamble released Crest nationally. For decades, fluoride remained the active ingredient in oral care products worldwide, credited with protecting the outer layer of teeth from cavity-causing bacteria. The Centers for Disease Control and Prevention lists the addition of fluoride to public drinking water as one of the top ten public health achievements of the 20th century, noting that it reduces cavities by 25 percent.
Skepticism toward fluoride has intensified recently. Health Secretary Robert F. Kennedy Jr. has linked water fluoridation to a range of health issues, including arthritis, bone fractures, and neurodevelopmental disorders. While experts like Bennett Amaechi, a professor at the University of Texas at San Antonio, state that low levels of fluoride are safe, he acknowledges a rising number of people who hesitate to use it, particularly for their children. This cultural shift has opened a market space for hydroxyapatite products, which are often promoted by influencers on social media.
Hydroxyapatite mimics the mineral composition of tooth enamel. Some nano-forms of the ingredient are designed to penetrate small pores in the enamel, potentially helping with remineralization and reducing sensitivity. Dr. Livia Tenuta, an associate professor at the University of Michigan School of Dentistry, explains that fluoride works by bringing minerals back to the tooth surface to form a protective shield. Hydroxyapatite appears to function differently by filling in crevices in the enamel structure.
Clinical data on hydroxyapatite is emerging but limited. A 2021 study in Scientific Reports tracked 177 children for nearly a year and found similar decay outcomes in groups using hydroxyapatite versus fluoride toothpaste. A 2023 study in Frontiers in Public Health followed 171 adults over 18 months with similar results. However, Dr. Tenuta notes that these studies often recruited participants with low caries risk. A separate 2019 study involving 133 high-risk individuals also found comparable performance between the two ingredients after five months.
Despite the promising early findings, most dental professionals recommend fluoride due to the volume of long-term research supporting its efficacy. Amaechi advises patients to stick with fluoride because the evidence base is more robust. The American Dental Association acknowledges the rising use of hydroxyapatite but states that evidence regarding its clinical effectiveness remains limited and ambiguous. The ADA continues to recommend brushing twice daily with fluoride toothpaste and flossing daily.
Price is another factor for consumers. Hydroxyapatite toothpastes generally cost more than their fluoride counterparts, with some products priced over a dollar more per ounce. While the science is still maturing, the demand for these alternative products shows no sign of slowing, with dentists noting that patient interest is a persistent part of their clinical discussions.
