Hydroxyapatite Toothpaste: Benefits, Science, and Why It Works
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Time to read 4 min
Most people have never heard of hydroxyapatite. But here's the thing —your teeth are already made of it. Around 90% of your tooth enamel ishydroxyapatite. Your dentin — the layer beneath enamel — is about 60%.So is your bone. Even your saliva carries calcium and phosphate ions —the building blocks of hydroxyapatite — specifically to remineralise yourteeth throughout the day.
So why have we spent decades putting fluoride in toothpaste instead? That's a fair question,and one that a growing body of international research is now addressing directly.
Why Hydroxyapatite Is the Most Scientifically Backed Ingredient in Modern Oral Care
What is hydroxyapatite?
Hydroxyapatite (Ca5(PO4)3(OH)) is described in the scientific literature as a biomimetic active ingredient, meaning it mimics the natural mineral structure of your teeth at a crystalline level. Rather than introducing a foreign compound, biomimetic hydroxyapatite works by replenishing the exact mineral your enamel is made from.
A 2024 international symposium report published in Bioinspired, Biomimetic and Nanobiomaterials, authored by leading researchers across the globe, summarised four decades of clinical evidence on hydroxyapatite in oral care. The findings are significant.
What does the research actually show?
Sensitivity relief
A systematic review and meta-analysis covering 44 clinical trials found that hydroxyapatite outperformed fluoride-containing toothpastes by approximately 23% for dentine hypersensitivity relief. It also out performed other desensitising formulations including strontium chloride products specifically designed for this purpose.
Cavity prevention
One of the earliest clinical studies, conducted in Japan in 1989, followed 181 primary schoolchildren over three years using a fluoride-free hydroxyapatite toothpaste. Caries inhibition rates reached 35–55% compared to the non-apatite group. More recently, an 18-month double-blind randomised clinical trial in adults found 89.3% of the hydroxyapatite group showed no increase in decay — compared to 87.4% in the fluoride group. The difference was not statistically significant, confirming what multiple trials now demonstrate: hydroxyapatite is non-inferior to fluoride for cavity prevention.
Natural whitening
Six clinical trials showed consistent improvement in tooth colour — with no peroxides, nobleaching agents, and no damage to enamel. The whitening effect works through optical diffuse reflection: hydroxyapatite particles form a fine layer on the tooth surface that reflects light, making teeth appear brighter naturally.
Safety, no dosage restrictions
Because hydroxyapatite is the natural mineral phase of human teeth and bones, it iscompletely safe if accidentally swallowed — releasing harmless calcium and phosphate ions. Itis present naturally in human breast milk, saliva, and blood.
Fluoride carries regulatory dosage restrictions — particularly for children under six, where guidelines require such small quantities that cleaning efficacy is significantly reduced. The USNational Toxicology Program has also raised concerns about fluoride's neurotoxic effects athigher exposure levels. Hydroxyapatite carries none of these restrictions.
Why this matters
The science on hydroxyapatite has been building since the late 1980s. What started with early studies in Japan and Germany has grown into a body of evidence including systematic reviews, meta-analyses, and randomised controlled trials across multiple countries and age groups.
This is exactly why Peg Paste is built around micro-hydroxyapatite. Not as a trend ingredient. Not as a marketing claim. But because four decades of international clinical research points clearly in this direction.
"The biomimetic active ingredient hydroxyapatite is ideally suited for thedaily oral care of all age groups because it has various preventingmodes of action and combines both efficacy and safety."
— Pawinska et al., Bioinspired, Biomimetic and Nanobiomaterials, 2024
REFERENCES
Hydroxyapatite as an active ingredient in oral care: an international symposium report (2024)
https://www.emerald.com/jbibn/article/13/1/1/1232928/Hydroxyapatite-as-an-active-ingredient-in-oral
PMC narrative review (2022):
https://pmc.ncbi.nlm.nih.gov/articles/PMC8930857/
18-month RCT — HA vs Fluoride (2023):
https://pmc.ncbi.nlm.nih.gov/articles/PMC10393266/
BDJ Open in situ RCT — Amaechi et al. (2019):
https://www.nature.com/articles/s41405-019-0026-8
15-study narrative review (2025):
https://www.mdpi.com/2079-4983/16/9/325
HA in oral care products — comprehensive review:
https://pmc.ncbi.nlm.nih.gov/articles/PMC8432723/
WHAT IS HYDROXYAPATITE?
Hydroxyapatite is a restorative mineral that occurs naturally in teeth and bones. Hydroxyapatite works to repair, remineralise and strengthen the tooth’s outer layer, acting as a buffer to help prevent mineral loss, tooth erosion, tooth sensitivity and plaque.
HOW DO PREBIOTICS SUPPORT ORAL HEALTH?
Prebiotics support oral health by promoting the growth of beneficial bacteria, which can help maintain a balanced environment in the mouth. It is important to maintain good oral hygiene so harmful bacteria does not take over potentially leading to bad breath, cavities and disease.
WHERE IS PEG PASTE MADE?
Peg Paste is made and manufactured in Australia.
DO YOU USE MICRO-HYDROXYAPATITE OR REGULAR HYDROXYAPATITE?
We use micro-hydroxyapatite in our toothpaste and ensure that it fully complies with current SCCS (Scientific Committee on Consumer Safety) and Australian oral care and cosmetic regulations. We are aware of the European Union’s upcoming ban on nano-materials in cosmetics starting November 2025. The reason for this ban is still unclear, but reports suggest potential risks if nano-hydroxyapatite is used in high concentrations or in sprayable products, where inhalation could be a concern. Since our toothpaste is not a spray and is formulated with concentrations that are within safe guidelines, we remain confident in its safety and effectiveness.
IS PEG PASTE SUITABLE FOR CHILDREN?
Absolutely. Prevention is key when it comes to oral health, so why not instil healthy habits early. Children’s toothpaste normally consists of a lower level or no fluoride because of the greater risk of potential fluoride toxicity. Given Peg Paste is a natural, fluoride-free formulation, it is safe for junior toothypegs. We recommend children use a pea size amount and brush under adult supervision.
I HAVE SENSITIVE HEALTH, IS THIS PRODUCT SUITABLE FOR ME?
Science shows that Hydroxyapatite helps ease tooth sensitivity by filling in microscopic pathways to the nerves in the teeth. With fewer pathways exposed, the less sensitivity and discomfort you should feel to touch, food and temperature. Remember to always consult your dental professional for oral health advice and before trying new products.
I SUFFER FROM DRY MOUTH, IS THIS PRODUCT SUITABLE FOR ME?
Peg Paste does not contain Sodium Lauryl Sulfate or SLS, a common ingredient that acts as a thickener in toothpaste products. SLS can have negative, degenerative effects that can contribute to, or worsen serious oral health issues such as dry mouth, mouth ulcers, mouth irritation and bad breath. Changing to an SLS free toothpaste can make a difference if you’re experiencing these symptoms. Remember to always consult your dentist or dental hygienist for oral health advice and before trying new products.
