Lauryn
Founder, PRIMALS
Is Your Toothpaste Toxic? A 2025 Investigation Found Lead in 90% of Toothpastes.
It is a morning ritual most people perform on autopilot: squeeze a ribbon of brightly colored paste onto a brush and scrub. But what if that daily habit was doing more harm than good? What if the very product designed to clean your teeth was silently exposing you to a cocktail of industrial chemicals and heavy metals?
A 2025 investigation by The Guardian revealed that the problem is more widespread than anyone imagined. The study found that approximately 90% of toothpastes were contaminated with lead, 65% with arsenic, and nearly half with mercury. These are not ingredients. They are contaminants hiding in the raw materials that make up your daily toothpaste.
This is not just about heavy metals. For decades, consumers have been told to trust ingredients like fluoride, Sodium Lauryl Sulfate (SLS), and triclosan. Yet a growing body of evidence links these chemicals to canker sores, gum irritation, and hormonal disruption. The good news? A dental revolution, decades in the making, is finally here. It is called nano-hydroxyapatite (nHAp), and it is poised to make fluoride obsolete.
The Research Says
A 2025 investigation found lead in 90% of toothpastes, arsenic in 65%, and mercury in nearly half. These contaminants hide in the raw materials of products used twice daily. Meanwhile, SLS is linked to canker sores and high cytotoxicity, triclosan is banned in hand soaps but still allowed in toothpaste, and titanium dioxide is banned as a food additive in the EU due to DNA damage concerns.
Sources: The Guardian, 2025; Frontiers in Dentistry (PMC7569277); FDA; EFSA, 2021
90%
of toothpastes contaminated with lead (The Guardian, 2025)
10%
nHAp concentration needed for measurable enamel remineralization
97%
of tooth enamel is made from hydroxyapatite, the mineral nHAp replaces
The Problem with Mainstream Toothpaste
Before exploring the solution, it is critical to understand the specific ingredients in your current toothpaste that may be causing harm.
These are not benign ingredients. They are industrial chemicals that have no place in a product you put in your body every single day. The oral microbiome is a delicate ecosystem, and dousing it with harsh detergents and endocrine disruptors has cascading effects on your overall health.
⚠ What Most People Miss
If your toothpaste contains SLS, parabens, titanium dioxide, propylene glycol, or synthetic fragrance, it contains industrial chemicals that were never designed to be swallowed twice a day. The oral mucosa absorbs directly into the bloodstream. Every brush is a delivery system.
The Solution: Remineralize, Do Not Just Fluoridate
For over 70 years, the dental industry has pushed fluoride as the one-and-only solution for cavity prevention. But fluoride works by forming a temporary, artificial shield called fluorapatite on the tooth surface. It does not rebuild what has been lost. And the concerns about fluoride go beyond your mouth. Research shows that fluoride accumulates in the pineal gland, disrupting sleep and melatonin production, and has been linked to hair loss through tap water exposure.
This is where nano-hydroxyapatite changes the game. Originally developed by NASA in the 1970s to help astronauts combat bone and tooth density loss in zero gravity, nHAp is a biomimetic material. It perfectly mimics the natural mineral that makes up 97% of your tooth enamel and 70% of your dentin (Journal of Applied Oral Science).
Instead of just shielding the tooth, nHAp becomes one with it. When you brush with nHAp, the nano-sized particles physically bond with your enamel, filling in the microscopic cracks and fissures that lead to cavities and sensitivity. It is not a temporary patch. It is a fundamental repair process. And when you pair it with a natural bristle toothbrush that will not scratch your enamel, the results are even better.
Why Most "Natural" Toothpastes Fail: The nHAp Dosage Deception
As consumers have grown wary of fluoride, a wave of "natural" and "fluoride-free" toothpastes has flooded the market. Many now advertise that they contain hydroxyapatite. However, there is a critical detail they often hide: the concentration.
Scientific research has shown that for nHAp to be effective at remineralizing enamel, it must be included at a concentration of at least 10% (Clinical Oral Investigations, 2021). Anything less, and the product is simply fairy-dusting the ingredient for marketing purposes without providing a therapeutic dose.
Don't Be Fooled
Most nHAp toothpastes on the market contain a mere 3 to 5% concentration. They are selling you on the promise of a revolutionary ingredient but failing to deliver the clinically proven amount required for real results. The peer-reviewed threshold for measurable enamel remineralization is 10%. Anything below that is marketing, not medicine.
The PRIMALS Difference: Clinically-Dosed, Toxin-Free, and Plastic-Free
This is precisely why we developed PRIMALS Fluoride-Free Toothpaste Tablets. Our tablets are formulated with a 10% concentration of rod-shaped nano-hydroxyapatite, the exact form and dosage shown to be most effective in clinical studies for repairing enamel and reducing sensitivity (Odontology, 2021; International Journal of Environmental Research and Public Health, 2022).
For a complete toxin-free oral care routine, pair the tablets with a PRIMALS Boar Bristle Toothbrush and a PRIMALS Copper Tongue Scraper.
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10% nHAp (Rod-Shaped)
The research threshold for measurable enamel repair. EU SCCS-confirmed optimal particle form.
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No SLS, No Sulfates
Gentle coconut-derived Sodium Cocoyl Glycinate. Cleans without irritation or canker sores.
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Zero Toxins
No titanium dioxide, no parabens, no propylene glycol, no triclosan, no synthetic fragrance.
♻️
Plastic-Free Glass Jar
Reusable and recyclable. TSA-approved. 60 tablets per jar. $20 one-time or $16 on subscription.
Upgrade your oral care routine.
Clinically-dosed nHAp. Zero toxins. Plastic-free glass jar.
SHOP PRIMALS TOOTHPASTE TABLETS NOWWhen I began investigating the oral care space for PRIMALS, I pulled up the ingredient labels on the top-selling toothpastes in the country. Every single one had SLS in the first three ingredients. Several had parabens. A few had triclosan. I had been using one of them every morning for years.
That realization stayed with me. Toothpaste felt medical. Official. Something your dentist recommended could not possibly be working against you. But the research told a different story. And when the 2025 Guardian investigation confirmed that heavy metal contamination was showing up in 90% of products on the shelf, it removed any remaining doubt. We built PRIMALS Toothpaste Tablets to use nHAp at the 10% concentration the research actually points to. The goal was always simple: build the product I wished existed when I was still using something that was quietly causing harm every single morning.
— Lauryn, Founder of PRIMALS
Frequently Asked Questions About Nano-Hydroxyapatite Toothpaste
Make the Switch to a Cleaner, Safer Smile
Your toothpaste should not be a source of lead, arsenic, endocrine disruptors, or harsh detergents. It should be a clean, effective tool that works with your body's natural biology to build a stronger, healthier smile.
The fix is simple. Switch to a toothpaste that rebuilds your enamel from within with the full clinical dose of nHAp and zero toxic ingredients. If you are also looking to decalcify your pineal gland, removing fluoride from your oral care is the logical first step.
Your Smile. Your Health. Your Choice.
Clinically-dosed nHAp. Zero toxins. Plastic-free.
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