Smear, Pea, or None at All? A Dentist's Guide to Toddler Toothpaste
You're standing in the toothpaste aisle. One tube says 0 to 2 years. Another says 3 to 6. A third says natural, fluoride-free and gentle, and has a leaf on it. The backs are covered in numbers you've never been taught to read.
Then you get home, and your toddler eats it off the brush.
This is one of the questions we're asked most in clinic, and the answer is simpler than the packaging suggests. Here's everything you need to know, based on UK guidance from the NHS and the British Society of Paediatric Dentistry.
Why fluoride, and why from the very first tooth
Fluoride does two things. It helps put minerals back into enamel after acid from plaque has pulled them out, and it makes that enamel harder to dissolve next time.
Baby teeth have thinner enamel than adult teeth, which means decay moves through them faster. Fluoride toothpaste is one of the most effective, best-evidenced ways to prevent it. That's why UK guidance is to start brushing with fluoride toothpaste as soon as the first tooth appears, usually around six months, not when your child is "old enough" for toothpaste.
How much toothpaste: smear or pea?
Under 3 years: a smear. A thin film of toothpaste across the bristles, roughly the size of a grain of rice. It looks like almost nothing. That's the point.
3 to 6 years: a pea-sized amount. An actual pea, not a generous blob. Most adults squeeze out five or six times this for themselves, so it's worth resetting your eye.
The amount matters more than most parents realise. A smear delivers enough fluoride to protect the teeth while keeping the amount swallowed very small, which is important because toddlers can't spit reliably yet.
Which strength: reading the ppm on the box
The number to look for is fluoride content, shown in parts per million (ppm). You'll usually find it in the small print on the back or side of the tube.
Under 3 years: a toothpaste with at least 1,000ppm fluoride.
3 to 6 years: a toothpaste with more than 1,000ppm. Many dentists recommend 1,350 to 1,500ppm at this age, particularly for children who've already had decay or are at higher risk. Ask your dentist which suits your child.
Here's the catch: some toothpastes marketed for babies and toddlers contain far less fluoride than this, and some contain none at all. The age on the front of the tube is a marketing label, not a clinical one. Always turn it over and check the ppm.
A useful rule: once you've found the right strength, the amount you put on the brush is what keeps it safe, not a weaker toothpaste.
Spit, don't rinse
After brushing, encourage your child to spit out the excess and then stop. No cup of water, no swilling.
It feels wrong, because most of us were taught to rinse. But rinsing washes away the concentrated fluoride that's meant to stay on the teeth and keep working after the brush is done. Leaving that thin layer behind is what makes the toothpaste effective.
For babies and young toddlers who can't spit at all, that's fine. Wipe away any obvious excess with the brush, and let the rest be. This is exactly why the smear is so small.
"They swallowed it." What now?
This is the question that sends parents to Google at 9pm, so let's be clear.
Swallowing some toothpaste during normal brushing is expected and safe. Toddlers swallow. That's already built into the smear and pea guidance. A smear of 1,000ppm toothpaste contains around a tenth of a milligram of fluoride, which is a tiny amount even for a very small child.
If they've eaten a lot straight from the tube, the most likely result is an upset stomach. If you think they've swallowed a significant amount, or they seem unwell, call NHS 111 or speak to a pharmacist, and have the tube with you so you can tell them the ppm. Then move the toothpaste somewhere they can't reach.
The longer-term thing to avoid is a child regularly swallowing much more than the recommended amount while their adult teeth are still forming beneath the gums. Over time, that can cause dental fluorosis, which usually shows up as faint white flecks or lines on the adult teeth. In its mild form it's cosmetic rather than harmful. The way to prevent it is simple: stick to the smear or pea, keep the tube out of reach, and don't let them lick toothpaste off the brush as a treat.
Are "natural" fluoride-free toothpastes worth it?
We understand the appeal. The packaging is lovely, the ingredient lists are short, and fluoride is sometimes talked about online as something to avoid.
Here's the honest position. A fluoride-free toothpaste will help clean your child's teeth, because brushing itself removes plaque. What it won't do is give the enamel the protection against decay that fluoride provides. No UK dental or health body recommends fluoride-free toothpaste for children.
Some fluoride-free pastes use alternatives such as xylitol or hydroxyapatite. Research on some of these is ongoing and interesting, but they aren't currently recommended as a replacement for fluoride in UK guidance.
If you've been using one, don't feel guilty. Just switch at the next tube, check the ppm, and mention it at your child's next check-up.
Other things on the label
Flavour: strong mint can feel spicy to a toddler and is a common reason for refusing to brush. A milder or fruit flavour is fine, as long as the fluoride level is right.
SLS-free: sodium lauryl sulphate is the ingredient that makes toothpaste foam. Some children with frequent mouth ulcers find SLS-free pastes more comfortable. It isn't necessary for most children, but it's a reasonable choice if foam bothers them.
No added sugar: almost all UK toothpastes already are, but it's worth a glance.
The ten-second summary
Fluoride toothpaste from the first tooth. A smear under three, a pea from three. At least 1,000ppm, checked on the back of the tube, not the front. Spit, don't rinse. Swallowing a little is fine. Keep the tube out of reach.
That's it. The rest is packaging.
The right toothpaste does its best work on the right brush. Brushi Bear™ was designed by two practising dentist-mothers for ages 0 to 4, with a double-sided head that cleans top and bottom even when little ones bite down, gentle modes for new teeth and gums, and a built-in nursery rhyme that runs the full two minutes.
For oral hygiene use by children under adult supervision. Not a toy.
