Rise of Hydroxyapatite Toothpaste Prompts Dental Experts to Weigh Fluoride Alternatives
A growing surge of interest in fluoride-free oral care is leading consumers to ask about alternative mineral ingredients like hydroxyapatite. Driven largely by online promotions, the trend has caught the attention of dental educators and researchers across the country.
“There’s a lot of interest from the patients,” said Dr. Jin-Ho Phark, an associate professor of clinical dentistry at the Herman Ostrow School of Dentistry of University of Southern California. “I hear that also regularly from students.”
Phark noted that many people inquire about hydroxyapatite—a calcium phosphate mineral—after seeing products online “being pushed by influencers and other people quite intensively.”
Examining the Science Behind Hydroxyapatite
Recent clinical research shows promising results for hydroxyapatite when compared to standard cavity-fighting ingredients. Bennett Amaechi, a professor of dentistry at the University of Texas at San Antonio, co-authored a 2021 study published in Scientific Reports that tracked 177 children over nearly a year. That trial found that hydroxyapatite toothpaste performed similarly to fluoride toothpaste in preventing tooth decay. The study received funding from Dr. Wolff Group, a German firm that manufactures two hydroxyapatite oral care brands.
The same German company helped fund a subsequent 18-month study published two years later in Frontiers in Public Health. Following 171 healthy young adults, researchers observed comparable outcomes between the two toothpaste types. An earlier 2019 trial published in the Journal of Investigative and Clinical Dentistry also tracked 133 high-risk participants for just over five months, finding that hydroxyapatite and fluoride yielded similar protective results.
Despite these findings, professional dental advisors urge caution before declaring hydroxyapatite a full replacement. ADA Consumer Advisor spokesperson Dr. Ada Cooper pointed out that research remains in its early stages, noting that “evidence about its clinical effectiveness remains limited and ambiguous, especially about clinical indications.”
Fluoride Safety and Public Health Context
Fluoride has served as the baseline standard for dental care since the late 1950s, when Procter & Gamble Co. Released Crest nationwide. According to the Centers for Disease Control and Prevention, adding fluoride to tap water decreases cavities by 25%, an intervention the agency previously hailed as one of the 20th century’s top public health achievements.
Public hesitancy around fluoride persists nonetheless. Health Secretary Robert F. Kennedy Jr. Has linked fluoridated water to health issues such as bone fractures, arthritis, neurodevelopmental disorders, thyroid disease, bone cancer, and lower IQ. However, Amaechi emphasized that no concrete evidence links standard fluoride exposure to IQ deficits in children, noting that studies pointing to cognitive risks examined fluoride levels more than double the concentration recommended for U.S. Tap water.
Highlighting broader health implications, Dr. Livia Tenuta, an associate professor at the University of Michigan School of Dentistry who specializes in cavity prevention, noted the deep links between oral bacteria and overall wellness. “There are these connections made between your oral health, and the bugs that you have in your mouth, and systemic health and even the composition of your gut microbiome,” Tenuta said.
While researchers continue studying non-fluoride formulations, standard fluoride products remain the default recommendation for mainstream practice due to decades of clinical data. Amaechi advises open-minded patients to stick with fluoride for now, simple because of its vast foundation of supporting evidence.