What age can you start teeth whitening?

18. SmilePro whitening products are not for anyone under 18, and 18 is the age most guidance uses: in the UK and EU, the law says the whitening products dentists use must not be used on anyone under 18 except to treat or prevent disease, and the UK's NHS says teeth whitening is not done for people aged 17 or under. If you are under 18 and unhappy with the colour of your teeth, the right first step is a dentist, not a whitening kit.

Whitening is popular on social media, so it is natural for teenagers to be curious, and for parents to look for a straight answer. This guide explains why the age limit exists, what teenagers can do about stained teeth instead, and what changes at 18.

Why is 18 the minimum age for teeth whitening?

Because teeth are still maturing in the teenage years, and whitening is a cosmetic treatment that can wait. Younger teeth have a larger pulp, the soft centre of the tooth that holds the nerve, so the nerve sits closer to the surface. Most staining in teenagers is on the surface and responds to better habits and a professional clean.

Can teenagers use teeth whitening products?

Not at-home whitening products. SmilePro's whitening kits, pens and strips must not be used by anyone under 18. If a dentist decides a young person needs treatment for a dental condition, that is a clinical decision for the dentist to make after an examination.

For parents: if your teenager is self-conscious about the colour of their teeth, book a dental check-up. A dentist can tell whether the staining is on the surface or inside the tooth, and advise on the right approach for their age.

What can teenagers do about stained teeth instead?

Good daily habits make the biggest difference, and none of them need a whitening product:

• Brush twice a day with a fluoride toothpaste, as the Australian Dental Association recommends, and clean between your teeth every day.
• Cut back on coffee, tea, energy drinks and coloured soft drinks, and rinse with water after them, as healthdirect Australia suggests.
• Have your teeth professionally cleaned at your dental check-up: it removes build-up and surface stains that brushing at home cannot.
• If you wear braces, take extra care with brushing, because plaque left around brackets can leave marks on the teeth.

What causes stained teeth in teenagers?

Most teenage staining comes from what we eat and drink and how well we brush. Common causes:

• Coffee, tea, energy drinks and coloured soft drinks.
• Plaque and food left on the teeth when brushing is rushed or skipped.
• Poor cleaning around braces.
• Certain medicines taken as a young child, including the antibiotics tetracycline or doxycycline, which healthdirect Australia says can discolour teeth from the inside.
• An injury to a tooth.

The first three are about habits and do not need whitening. Staining from medicines or an injury needs a dentist to assess it.

What changes at 18?

At 18, adults with healthy teeth and gums can consider whitening, at the dentist or at home. A dental check-up first is a good starting point, especially if you have sensitive teeth, gum problems or untreated decay. Whoever you choose, check that the product lists every ingredient and follow the instructions exactly. Read Is teeth whitening safe? before you start.

Key takeaways

• The minimum age for teeth whitening is 18: SmilePro whitening products are not for anyone under 18.
• In the UK and EU, the law sets 18 as the minimum age for the whitening products dentists use, except to treat or prevent disease.
• Most staining in teenagers is on the surface and improves with brushing, fewer staining drinks and a professional clean.
• If a teenager is unhappy with the colour of their teeth, a dental check-up is the right first step.

Sources

This guide is general information, not dental advice. If you have any concerns about your teeth or gums, speak to a dentist.

• NHS, Teeth whitening, page reviewed 19 August 2025.
• General Dental Council (UK), Tooth whitening position statement, read 7 October 2026.
• healthdirect Australia, Teeth whitening, last reviewed February 2025.
• Australian Dental Association, Teeth whitening (teeth.org.au), read 7 October 2026.
• SmilePro, Terms and Conditions, section 4, "Product Use and Cautions".

Last updated: 7 October 2026.