Fluoride

Understand fluoride’s role in tooth mineralisation, the difference between dental products and swallowed supplements, and what to check on the label.

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In this guideIngredient basics & practical choices

What is fluoride?

Fluoride occurs naturally in water and some foods and is also used in dental products. It is usually discussed in relation to teeth, rather than as a general-purpose nutritional supplement.

Exposure varies with drinking water, food and dental-care habits. Fluoride toothpaste acts on the tooth surface; a swallowed tablet or drop is a different type of product and should not be treated as interchangeable.

What does fluoride support?

Fluoride contributes to the maintenance of tooth mineralisation. Mineralisation describes the mineral structure that helps keep teeth strong. In dental care, fluoride helps protect against tooth decay.

The authorised food claim below concerns tooth mineralisation. It does not establish that everyone needs a swallowed fluoride supplement or that a food-claim condition is a toothpaste-strength recommendation.

Start with everyday dental care

Brush twice a day for about two minutes with fluoride toothpaste. NHS advice for adults is to choose a toothpaste containing at least 1,350 ppm fluoride. Spit out after brushing rather than rinsing immediately. Follow age-specific advice for children and ask a dental professional if unsure.

Do you need an oral fluoride supplement?

Do not add swallowed fluoride products simply because a mineral claim exists. Ask a dentist to assess the need in light of your dental health and other fluoride sources. Higher-strength dental products may also require professional advice.

Too much swallowed fluoride while teeth develop can cause dental fluorosis. EFSA’s 2025 assessment considers total ingestion from water, food and swallowed dental products. Its safe intake level for people aged nine and above, including adults, is 3.3 mg per day; younger children have lower age-specific upper levels. These are safety reference levels, not amounts to aim for.

The 3.5 mg EU nutrition-label reference shown in the regulatory details is a separate labelling value, not a recommended supplement dose or an updated safety limit.

Fluoride product labels and amounts

Toothpaste concentration is usually shown in ppm; swallowed supplement amounts are usually in mg. They describe different things. Check the fluoride concentration and intended age group on a dental product, and follow the directions rather than comparing it with a supplement dose.

EU health claim details

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Authorised health claims

EU-authorised health claims (Article 13)

1 authorised

● Fluoride contributes to the maintenance of tooth mineralisation.Tooth mineralisation · General population

Claim type
Health functions (Article 13)

Condition of use
The claim may be used only for food which is at least a source of fluoride.

What does “source of” usually mean?
General food: 0.525 mg / 100 g or 100 ml
Beverage: 0.263 mg / 100 ml
Single-portion pack: 0.525 mg per portion
Calculated from the EU NRV significant-amount reference. Claim-specific conditions take precedence.

EFSA / scientific assessment
EFSA opinion reference listed in the EU Register / Regulation (EU) No 432/2012

EU legal source
Commission Regulation (EU) No 432/2012 (consolidated 20 Aug 2025)

Other assessed health claims (1)

Not authorised for use in the EU

View claims ↓

A non-authorised claim is not automatically the same as a scientifically disproven claim. Open a claim to see the recorded reason or source details where available.

● Fluoride supports the mineralisation of bones.Bones ·

Claim type
Health functions (Article 13)

Condition of use
—

EFSA / scientific assessment
EFSA Journal 2009;7(9):1212

EU legal source
—

Additional statement / restriction
Non-compliance with the Regulation because on the basis of the scientific evidence assessed, this claimed effect for this food has not been substantiated.

Regulatory details

Check how the claims on this page are classified and where their regulatory information comes from.

View page-level details

Ingredient: Fluoride
Category: Mineral
NRV: 3.5 mg
Authorised claims: 1
Other assessed claims: 1
Claim framework: EU nutrition and health claims framework. Individual claim cards show the specific claim type, conditions of use, EFSA reference and legal source available in the version data.

Tip: expand any claim above for its claim-specific source details. The European Commission's EU Register is an information service; legal acts are the authoritative source for legal requirements, and some pending claims are not shown in the Register.

Claim use requirements

How much of this nutrient must a food contain for an EU health claim to be used?

For claims requiring the food to be a source of Fluoride, the usual NRV-based significant amount is:

0.525 mg / 100 g or 100 ml for foods other than beverages
0.263 mg / 100 ml for beverages
0.525 mg per portion if the package contains only one portion

These are the general EU significant-amount reference levels. A claim-specific condition may be stricter and takes precedence.

Sources

Sources & further reading

Updated 26 October 2026.