You bring a toothpaste back from a trip, and the number printed on the tube is not the one you are used to. Or you order from a foreign site and run into a "5000 ppm" that no French pharmacy sells without a prescription. It is neither a mistake nor a scam: fluoride is regulated country by country, and the border is not where you would expect.
The short answer
The over-the-counter ceiling is almost the same everywhere: 1500 ppm fluoride. The European Union sets it in its cosmetics regulation, the American FDA holds it in its monograph, and Japan has raised its own limit to that level. So what changes from one country to another is not really the figure — it is the legal status of the product above that threshold, and the age at which each country recommends what. Above 1500 ppm, you are no longer dealing with a cosmetic but with a medicine, dispensed on prescription.
The same ceiling, three different regimes
| Region | Over-the-counter ceiling | Product status | Above it |
|---|---|---|---|
| European Union | 1500 ppm | Cosmetic (Regulation EC 1223/2009), with labelling rules covering 21 fluoride compounds | Medicine |
| United States | 1500 ppm | Over-the-counter drug, governed by the FDA fluoride monograph | Prescription — 5000 ppm toothpastes exist and are dispensed by pharmacies |
| Japan | 1500 ppm since 2017 (1000 ppm before) | Between 1000 and 1500 ppm: quasi-drug, a category specific to Japanese law | 5000 ppm is not marketed in Japan, even on prescription |
The lesson is counter-intuitive: an American toothpaste at 1450 ppm and a French one at 1450 ppm contain the same thing. What differs is the administrative box each country files them in — cosmetic here, OTC drug there, quasi-drug in Japan.
What the WHO recommends, and why it is the real benchmark
Above national regulations sits a common health reference. The World Health Organization holds a range of 1000 to 1500 ppm fluoride as the standard recommended public-health measure for caries prevention.
That explains why the ceilings converge. Regulators did not pick 1500 ppm at random or independently: it is the top of the range judged both effective and safe for daily use without medical supervision.
💡 The number to know: 1450 ppm, the most common adult dose in Europe, sits deliberately just below the 1500 ceiling. That is no coincidence: it is the margin manufacturers give themselves to stay compliant despite production tolerances.
Why Japan long stood apart
Until 2017, Japan capped its toothpastes at 1000 ppm, a third below Europe. That singularity still feeds the received idea that "the Japanese don't use fluoride" — which is false, but not made up out of nothing.
The country built its prevention policy differently: very little water fluoridation, and a long-standing reliance on other approaches — including hydroxyapatite, approved there as an anti-caries agent as early as 1993. Raising the limit to 1500 ppm marks a late alignment with the international standard, not a reversal.
One detail that matters for travellers: 5000 ppm toothpastes, common on prescription in the United States and Europe for patients at high caries risk, are not available in Japan, even when prescribed.
Three common mistakes when buying abroad
- Assuming a higher number is "better". Above 1500 ppm, a toothpaste is aimed at high-caries-risk profiles identified by a professional. It is not a premium version, it is a treatment.
- Bringing back a high-dose tube for a child. This is the most consequential error: dental fluorosis comes from repeated ingestion while the teeth are forming. Paediatric doses are reduced for exactly that reason, and they vary between countries.
- Reading "fluoride free" as a mark of quality. In a market like the United States, that claim is first and foremost a selling point. It says nothing about what replaces the fluoride — see our article on fluoride-free toothpaste: who is it for, what are the risks.
How to read a foreign tube in thirty seconds
- Look for "ppm F" or "ppm fluoride". That is the only figure that counts. If it is not printed, look for the compound: sodium fluoride, sodium monofluorophosphate, stannous fluoride, with its percentage.
- Convert if needed. 0.145 % sodium fluoride ≈ 1450 ppm fluoride; 1.1 % sodium fluoride ≈ 5000 ppm. A percentage on its own, without an "F", refers to the salt, not the fluoride.
- Check the age statement. It is mandatory in Europe and often present elsewhere. An adult tube is not a child's tube, even at the same dose.
⚠️ What this article does not replace. If your dentist has prescribed a high-dose toothpaste, follow the prescription and do not substitute a product bought abroad: the prescribed dose answers a risk assessed on your mouth, not on an average.
Where we stand
Our toothpastes are dosed at 1450 ppm fluoride, the European adult standard, and sold as cosmetics — so without prescription or restriction. We offer neither a high-dose version, which belongs to prescription, nor a fluoride-free one.
The parameter we watch on top of the dose, and that very few brands publish, is abrasiveness. A properly fluoridated but overly abrasive toothpaste wears away the enamel it is meant to protect. Our whole range stays below an RDA index of 70, and we have published the record of RDA values for toothpastes sold in France, with the list of brands that publish none.
Read also: Fluoride at 1450 ppm: what it actually does in your toothpaste
Read also: Fluoride or Hydroxyapatite Toothpaste: Which Should You Choose?
Your questions about fluoride across countries
Is a 1450 ppm toothpaste bought abroad the same as in France?
Yes: the fluoride content is the only figure that matters, and 1450 ppm stays 1450 ppm whatever the country. What changes is the administrative box: cosmetic in Europe, over-the-counter drug in the United States, quasi-drug in Japan.
Can you use a 5000 ppm toothpaste without a prescription?
No. Above 1500 ppm, the product is a medicine reserved for patients at high caries risk, on prescription and with follow-up. It is not a “more effective” version for everyone, and it must be kept out of children’s reach.
How do you convert a sodium fluoride percentage into ppm?
Sodium fluoride contains about 45% fluoride: 0.145% sodium fluoride corresponds to roughly 1450 ppm fluoride, 1.1% to 5000 ppm. For sodium monofluorophosphate, 1.1% corresponds to about 1450 ppm. A percentage without “F” refers to the salt, not the fluoride.
What to take away
- The over-the-counter ceiling converges at 1500 ppm in Europe, the United States and Japan.
- What changes is the status: cosmetic in Europe, OTC drug in the United States, quasi-drug in Japan.
- Above 1500 ppm it is a prescription — 5000 ppm exists in the US and Europe, not in Japan.
- The WHO holds 1000 to 1500 ppm as the public-health standard: that is the real benchmark.
- Never bring back a high-dose tube for a child: fluorosis is the documented risk.
This article does not replace dental advice. The right dose for a child, or for an adult at high caries risk, is a professional decision.