Dental knowledge · Prevention

Fluoride for babies and children: which amount suits which age?

In Germany, fluoride is recommended to help prevent tooth decay from infancy. Age, the eruption of teeth and total fluoride exposure all matter. Fluoride toothpaste becomes important once the first tooth appears. Fluoride tablets and fluoride toothpaste should not be combined. This overview mainly covers the first six years of life; parents should agree an individual plan with the child’s medical and dental teams.

Published on 07.11.2026

Small children’s toothbrush, a closed unbranded tube and a cup on a pale surface. — With children’s toothpaste, the fluoride concentration and the amount used both matter.

In this guide

Concentration and amount are different things

The label “1,000 ppm” describes the fluoride concentration in toothpaste, not the amount placed on the brush. A long strip of toothpaste is not intended for young children. Fluoride supports protection mainly at the tooth surface. Young children swallow some toothpaste, however, so an appropriate concentration and a very small portion both matter.

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Before the first baby tooth

The joint German recommendations provide for a daily tablet containing 0.25 mg fluoride and 400–500 International Units of vitamin D until the first tooth erupts. The product and any exceptions should be agreed with the paediatric practice. Do not add a second fluoride supplement. The special situation for babies mainly fed infant formula is explained below.

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First tooth to first birthday: choose one approach

Gentle brushing matters from the first tooth. When fluoride toothpaste is used, German recommendations specify a rice-grain-sized portion containing 1,000 ppm fluoride up to twice a day. Vitamin D is then given without fluoride. If your baby currently takes a combination tablet, discuss the change explicitly.

As an alternative during the first year, the joint recommendations describe the combination tablet together with brushing without toothpaste or with a small amount of fluoride-free toothpaste. Do not mix the two approaches. The question is which agreed plan applies now, not how to add as many fluoride products as possible.

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From the first birthday: the portion increases later

From the first birthday, toothpaste takes centre stage. The familiar size comparisons are intended to help with dosing; what matters is a small portion applied by an adult.

12 to under 24 months: brush twice daily at home with 1,000-ppm fluoride toothpaste, using no more than a rice-grain-sized amount, approximately 0.125 g.
From 24 months to age six: brush twice daily at home with 1,000-ppm fluoride toothpaste, using no more than a pea-sized amount, approximately 0.25 g. An additional brushing session with the same amount is recommended at nursery.

KZBV: Fluoride für Kinder, Stand Mai 2025

An important exception: water used for infant formula

If a baby is fed exclusively or mainly with infant formula, the water used to prepare it also matters. At a fluoride content of 0.3 mg per litre or above, German recommendations specify vitamin D without fluoride. Once teeth erupt, this situation calls for either a rice-grain-sized amount of fluoride toothpaste only once daily or fluoride-free toothpaste.

Discuss this with the practice caring for your baby. The fluoride content is available from the water supplier or the mineral-water label. Do not rely only on marketing statements about suitability for babies; the actual fluoride concentration matters.

Deutsche Gesellschaft für Ernährung: FAQ Fluorid, aktualisiert 27. April 2026 · Netzwerk Gesund ins Leben: Fluorid-Überdosierung vermeiden

Making the recommendation practical

Parents apply the toothpaste and help with brushing or finish brushing while the child’s motor skills are still insufficient. A demonstration is more helpful than guessing: bring the brush and tube to a preventive appointment and ask to be shown. Practise calmly, without forceful restraint.

A short list is enough for coordination: age, first tooth, toothpaste name and fluoride concentration, any tablet, water used for formula and brushing at nursery. These details help prevent different caregivers from unknowingly following different plans.

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Discuss questions about oral care

If you are unsure about oral care, contact the child’s dental or paediatric practice. When contacting SMILE meets DESIGN in Cologne, mention the child’s age and your question. An individual dosing decision cannot be made from an online article alone.

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Common questions

What does rice-grain-sized mean?

It means a very small portion of no more than about 0.125 g of toothpaste. Ask for a demonstration on your child’s own brush; the whole bristle surface should not be covered.

Netzwerk Gesund ins Leben: Fluorid-Überdosierung vermeiden

Is the larger portion recommended from age two?

Yes. German recommendations specify a pea-sized amount containing 1,000 ppm fluoride from the second birthday. Different age limits may come from guidance used in other countries.

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Why should I not use a larger amount?

Consistently excessive fluoride intake while teeth develop can cause enamel changes known as dental fluorosis. This is why the portion and all sources of fluoride are considered.