Best Hydroxyapatite Toothpaste UK: What It Is And How To Choose

Toothpaste used to be a minty afterthought. Now the tubes have fewer ingredients, pared-back packaging, and “fluoride-free” on the front, next to a mineral most of us last met in a biology lesson. That mineral is hydroxyapatite, and the internet’s fluoride feud has handed it a very large audience.

The logic is easy to follow. Enamel is mostly hydroxyapatite, so a hydroxyapatite toothpaste sounds like a refill. Whether it performs like one depends on the research, and on whose mouth it is going into.

We asked dentist Dr. Victoria Sampson, BDS, MFDS RCS Ed, to cut through the claims. Here's what the science says, what actually matters on the ingredients list, and whether it's worth making the switch.

What is hydroxyapatite toothpaste?

Hydroxyapatite is a calcium phosphate mineral, and around 97% of your tooth enamel is made of it, according to Dr. Sampson. "It's essentially the same mineral our teeth are made from, which is what makes it so interesting in dentistry." In toothpaste, tiny particles of it stick to the tooth surface, fill microscopic rough patches, and help areas that have started losing mineral take it back up. That process is called remineralisation.

Dr. Sampson explains it with a brick wall. "Imagine your tooth enamel as a brick wall, with the bricks representing the minerals that give our teeth their strength." Every day, acids from food, drinks, and bacteria pull out tiny bricks, which weakens the wall over time and can end in a cavity. Hydroxyapatite supplies mineral particles that settle into the gaps, "almost like adding new building material to reinforce the wall."

She also describes hydroxyapatite as biomimetic, meaning it copies something the body already makes. Your teeth get the material they are built from, so it works with your enamel instead of coating over it.

What does hydroxyapatite do for your teeth?

Hydroxyapatite has two main benefits worth knowing about. "The evidence is increasingly promising," says Dr. Sampson, "particularly for early enamel remineralisation and tooth sensitivity."

• Strengthening enamel. When acids strip minerals from your teeth, hydroxyapatite can help replace some of what's been lost, smoothing microscopic imperfections and supporting the repair of early damage before a cavity forms.
• Easing sensitivity. Those sharp twinges when you drink something cold? Hydroxyapatite particles can help block the tiny channels in exposed dentine that transmit sensitivity towards the nerve.

Evidence comes in tiers, and Dr. Sampson says "it's important to distinguish between lab evidence, short-term clinical improvements and long-term cavity prevention." Lab studies show what is possible. Short trials show what happens over weeks. Long trials show whether people end up with fewer cavities, and hydroxyapatite has fewer of those than fluoride does. When a brand cites a study, check which tier it belongs to.

Can hydroxyapatite repair enamel?

"It can't rebuild a tooth once a physical cavity has formed, but it may help strengthen enamel and support the repair of very early mineral damage before a cavity develops if it is the right size and structure," explains Dr. Sampson. If you spot a hole, notice a new dark mark, or have sensitivity that won't settle, book a dentist's appointment.

Hydroxyapatite vs fluoride: which works better?

They work in slightly different ways. In Dr. Sampson's brick-wall analogy, fluoride reinforces the existing bricks, making them more resistant to acid and helping lost minerals return to the enamel. Hydroxyapatite supplies new building material to fill the gaps. Both help strengthen teeth and protect against early damage.

Hydroxyapatite has held its own in some clinical trials. In an 18-month study involving 189 adults, researchers compared a fluoride-free hydroxyapatite toothpaste with one containing 1,450 ppm fluoride. Of the 171 participants who completed the study according to protocol, 89.3% of those using hydroxyapatite and 87.4% of those using fluoride showed no increase in their measured tooth decay. The researchers concluded that hydroxyapatite was not inferior to fluoride in this trial.

Encouraging? Definitely. Proof that every hydroxyapatite toothpaste protects teeth as well as fluoride? Not quite. The findings apply to the particular formula and group studied, and fluoride still has a much larger body of long-term research behind it. "We have decades of large-scale evidence supporting fluoride, whereas the hydroxyapatite evidence base, although growing, is still comparatively smaller,” says Dr. Sampson.

So, should you make the switch? It depends on your teeth. For someone with healthy teeth and a low risk of decay, Dr. Sampson says hydroxyapatite may be a reasonable alternative. She'd be more cautious about going fluoride-free if you have any of the following.

• Active decay or a history of frequent cavities
• Dry mouth
• A diet high in sugar or acidic foods and drinks
• Braces or other orthodontic appliances
• Exposed tooth roots

And you don't necessarily have to choose between them. "I don't think it needs to be a case of fluoride versus hydroxyapatite. Both have their place in dentistry, and there are even toothpastes that combine the two. The most important thing is choosing a toothpaste based on your individual oral health needs rather than following a trend."

Why do some dentists not recommend hydroxyapatite toothpaste?

If hydroxyapatite looks promising in clinical trials, why aren't all dentists recommending it? The main sticking point is the research. Fluoride has decades of evidence behind it, while hydroxyapatite has fewer long-term studies showing how well it prevents cavities in everyday use.

There's also the question of what's actually in the tube. Hydroxyapatite toothpastes vary in particle size, concentration, and formulation, so a positive result for one product doesn't automatically apply to another. For someone prone to cavities, that uncertainty matters. For someone with a low risk of decay, Dr. Sampson considers it a reasonable option.

Nano vs micro hydroxyapatite: what's the difference?

Particle size. Nano-hydroxyapatite is made of extremely small particles that can reach microscopic irregularities in the enamel surface and exposed dentinal tubules. Micro-hydroxyapatite uses larger particles, which still deposit on the tooth and help build a protective mineral layer. Back to the wall, nano particles are closer to the size of the bricks themselves, while micro forms a protective coat over the wall.

Smaller sounds better, and Dr. Sampson is wary of that shortcut. "Smaller doesn't automatically mean more effective." Particle shape, concentration, stability, and the whole formula all play a part.

The word "nano" also raises safety questions, which is fair. Dr. Sampson's read is reassuring, with a condition attached. "Current safety assessments are reassuring for certain well-characterised forms of nano-hydroxyapatite used in toothpaste at assessed concentrations." The EU's Scientific Committee on Consumer Safety has also assessed nano-hydroxyapatite. Its latest opinion, published in 2025, found it safe in toothpaste at concentrations up to 29.5%, provided the particles meet specific requirements around shape, size, and surface treatment. The assessment doesn't cover needle-shaped particles.

That specificity is the point. "Not all nanoparticles are identical. Their shape, size and surface characteristics matter, so safety findings for one form cannot automatically be applied to every nano-hydroxyapatite ingredient." Her advice is to choose products from reputable manufacturers that can demonstrate ingredient safety and formulation testing.

What percentage of hydroxyapatite should toothpaste contain?

Around 10% is a good benchmark when comparing hydroxyapatite toothpastes, according to Dr. Sampson. It's a concentration used in clinical research, although there's no universally agreed ideal amount. "Most of the clinical trials showing caries protection used 10%."

But don't assume 20% must be twice as effective. The size and shape of the particles, the rest of the formula, and how consistently you brush all matter. As Dr. Sampson puts it, "A well-formulated 10% product used twice daily will likely do more than a poorly formulated 20% one."

Check whether the brand actually discloses its percentage, and whether it has research to support the formula. If the number isn't available, ask the manufacturer. And remember that the percentage alone won't tell you how well a toothpaste works.

Is hydroxyapatite good for sensitive teeth?

Sensitivity is one of hydroxyapatite's more promising uses. When the dentine beneath your enamel becomes exposed, hot or cold food and drinks can trigger fluid movement inside tiny channels called dentinal tubules. That's what causes the familiar sharp twinge.

Hydroxyapatite particles can plug the openings. By reducing that fluid movement, Dr. Sampson says, they may ease sensitivity to cold, heat, and touch. Several trials show it reduces dentine hypersensitivity, often with effects comparable to established desensitising agents, and two meta-analyses of the research (one from 2019 and an update in 2023) back this up.

If you have sensitivity or gum recession, check abrasivity too, because a highly abrasive formula can wear away the benefit. Sensitivity that keeps coming back is worth a dentist's appointment.

Is hydroxyapatite toothpaste safe?

Generally, yes. Hydroxyapatite has a reassuring safety profile when used in toothpaste, including certain nano forms. The important detail is the formulation, as safety assessments don't automatically apply to every particle size or shape, as we've covered above.

But safe doesn't necessarily mean suitable for everyone. If you're prone to cavities, the bigger consideration is whether a fluoride-free toothpaste offers enough protection for your teeth.

What about children? Hydroxyapatite has been studied in younger teeth, too. A one-year clinical trial found that a microcrystalline hydroxyapatite toothpaste performed comparably to fluoride for preventing the progression of early decay in the children studied. However, the NHS still recommends fluoride toothpaste for children, with age-appropriate amounts and concentrations. If you're looking for a fluoride-free switch for your child, it's worth speaking to their dentist first.

How to choose a hydroxyapatite toothpaste

"I always encourage patients to look at the toothpaste as a complete formulation rather than focusing on one fashionable ingredient," says Dr. Sampson. So, before adding a tube to your basket, here's what to check.

• The hydroxyapatite concentration. Around 10% is a useful research benchmark, but don't rule out a product purely because it contains less. Look for transparency about the amount used and evidence supporting the formula.
• Nano or micro. Both have potential benefits. The size, shape, and quality of the particles matter, so look for a manufacturer that explains what it's using.
• Fluoride content. If you regularly get cavities, have dry mouth, or wear braces, fluoride remains the better-established choice. A toothpaste combining fluoride and hydroxyapatite is another option.
• The rest of the ingredients. SLS can irritate some mouths, particularly if you're prone to ulcers, while highly abrasive formulas may aggravate sensitive teeth. Xylitol is a useful sugar-free ingredient to look out for, although its additional cavity-prevention benefits aren't firmly established.

And don't forget how you use it. Brush twice daily for two minutes, including before bed. If you're using fluoride toothpaste, spit rather than rinse afterwards to keep the fluoride working on your teeth.

The best hydroxyapatite toothpastes in the UK

Start with what you want your toothpaste to do, then check the label for particle type, percentage, and fluoride status.

Best overall

Davids Enamel Health + Whitening Toothpaste

Davids passes plenty of Dr. Sampson’s label checks. This hydroxyapatite toothpaste names its nano-hydroxyapatite, skips fluoride and SLS, and gets its flavour from natural peppermint oil instead of artificial flavours, colours, or preservatives. It is EWG Verified, comes in a recyclable metal tube, and supports enamel while helping teeth look brighter.

Best for sensitive teeth

Davids Sensitive + Whitening Toothpaste with Nano-Hydroxyapatite

If cold drinks regularly make you wince, this is the Davids formula worth looking at. Its rod-shaped nano-hydroxyapatite is designed to support enamel and help block the exposed channels associated with sensitivity, while gentle polishing ingredients tackle surface stains. It's fluoride-free, SLS-free, and peppermint-flavoured, although the brand doesn't disclose the hydroxyapatite percentage. If sensitivity keeps coming back, get it checked rather than relying on toothpaste alone.

Best fluoride-free

Terra & Co Gentle Green Toothpaste

If you're going fluoride-free, Terra & Co makes it easier to see what you're getting. Unlike brands that keep their concentration under wraps, Gentle Green contains a disclosed 8–10% hydroxyapatite, close to the 10% discussed earlier. The vegan formula is designed to be low-abrasion, with xylitol and a subtle mint flavour. A good option to consider if you have a low risk of decay and want more transparency about what's in your toothpaste.

Best nano-hydroxyapatite toothpaste

Boka n-Ha Toothpaste in Ela Mint

Boka has made nano-hydroxyapatite the star of its formula, pairing it with xylitol, aloe vera, and green tea extract. Ela Mint combines peppermint, spearmint, and a hint of cardamom for something a little different from your usual toothpaste. It's fluoride-free and clearly identifies its hydroxyapatite as nano. It's also a Healf customer favourite, with a 4.9-star rating from more than 100 reviews.

Best premium

Fygg Nano-Hydroxyapatite Toothpaste

A premium formula is mostly about what it leaves out, and Fygg’s list is long. There’s no SLS, essential oils, emulsifiers, detergents, or fluoride. What it does contain is nano-hydroxyapatite with xylitol, chicory root prebiotics, and L-arginine for a balanced mouth, finished with a mild mint.