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Vorderseite der Junior Karex Zahnpasta-Verpackung (65 ml) mit passender Tube im Vordergrund. Beide zeigen das orange-blaue „JUNIOR KAREX“-Logo sowie den Text „Zahnpasta mit BioHAP® ohne Fluorid“ und „Biomimetischer Hydroxylapatit“. Auf der Verpackung oranger Hinweis „6–12 Jahre“ und „Ohne Fluorid“. Pluspunkte: „Kariesschutz für die bleibenden Zähne“ und „Remineralisiert Kreidezähne (MIH)“. Made in Germany.
Rückseite der Junior Karex Zahnpasta-Verpackung, 65 ml, in Weiß und Türkis. Oben das orange-blaue „JUNIOR KAREX“-Logo mit „Zahnpasta“-Schriftzug. Im türkisfarbenen Bereich Beschreibung: Geeignet für das Wechselgebiss (Milchzähne und bleibende Zähne), bietet Kariesschutz mit BioHAP (biomimetischer Hydroxylapatit), ohne Fluorid. Vorteile: Remineralisiert und minimiert Bakterienanlagerung, beruhigt und schützt das Zahnfleisch mit Allantoin, unterstützt bei Kreidezähnen (MIH), fördert Remineralisierung.
Seitenansicht der Junior Karex Zahnpasta-Verpackung, 65 ml, in Weiß und Türkis. Oben das orange-blaue „JUNIOR KAREX“-Logo mit „Zahnpasta“-Schriftzug. Im türkisfarbenen Bereich drei Symbole: ohne Fluorid, ohne Titandioxid, ohne Natriumlaurylsulfat. Darunter die Inhaltsliste (Aqua, Hydrated Silica, Glycerin, Sorbitol, Hydroxyapatite, Xylitol, u.a.). Hersteller: Dr. Kurt Wolff, Bielefeld, Deutschland
Seitenansicht der Junior Karex Zahnpasta-Verpackung, 65 ml, in Weiß und Türkis. Oben das orange-blaue „JUNIOR KAREX“-Logo mit „Zahnpasta“-Schriftzug. Im türkisfarbenen Bereich der Hinweis „Fluoridfreier Kariesschutz“ sowie Text mit Verweis auf Informationen und Studien zur Wirksamkeit von BioHAP (biomimetischer Hydroxylapatit) und fluoridfreier Zahnpasta auf www.karex.de.
Rückseite der Junior Karex Zahnpasta-Tube, 65 ml, mit blauem Text. Beschreibung: Für das Wechselgebiss mit Milchzähnen und bleibenden Zähnen; bietet wirksamen Kariesschutz mit BioHAP (biomimetischer Hydroxylapatit), ohne Fluorid. Vorteile: Remineralisiert und minimiert Bakterienanlagerung, beruhigt und schützt das Zahnfleisch, unterstützt bei Kreidezähnen (MIH), fördert Remineralisierung, reduziert Schmerzempfindlichkeiten. Hersteller: Dr. Kurt Wolff, Bielefeld, Deutschland.
Zwei Tuben JUNIOR KAREX Zahnpasta, Aufschrift: „Zahnpasta mit BioHAP ohne Fluorid. Biomimetischer Hydroxylapatit“.
Drei Tuben JUNIOR KAREX Zahnpasta, Aufschrift: „Zahnpasta mit BioHAP ohne Fluorid. Biomimetischer Hydroxylapatit“.
Vier Tuben JUNIOR KAREX Zahnpasta, Aufschrift: „Zahnpasta mit BioHAP ohne Fluorid. Biomimetischer Hydroxylapatit“.

JUNIOR KAREX toothpaste

Cavity protection for permanent teeth. With BioHAP instead of fluoride

  • Remineralises and minimises bacterial adhesion
  • Also supports in cases of chalky teeth (MIH)
  • Soothes and protects the gums with allantoin
  • Promotes the remineralisation of the teeth
  • Reduces tooth sensitivity
€9.98130 ml (€76.77 / 1 l) • incl. VAT, plus shipping

Delivery options

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Delivery time: 2–4 working days

Free shipping from €15

Aqua, Hydrated Silica, Glycerin, Sorbitol, Hydroxyapatite, Xylitol, Silica, Cellulose Gum, Calcium Carbonate, Dicalcium Phosphate Dihydrate, Sodium Methyl Cocoyl Taurate, Sodium Cocoyl Glycinate, 1,2-Hexanediol, Caprylyl Glycol, Sodium Chloride, Sodium Saccharin, Allantoin, Aroma, Carvone, Mentha Viridis Leaf Oil, Menthol, Anethole, Limonene.

Description: No worries with JUNIOR KAREX

JUNIOR KAREX is the ideal toothpaste for the daily brushing of the first permanent teeth: By repairing tooth enamel, it effectively protects against cavities and also helps with chalky teeth (MIH) – with BioHAP instead of fluoride.

  • BioHAP remineralizes teeth and protects against cavities

  • Reduces sensitivity associated with chalky teeth (MIH)

  • Allantoin soothes and protects the gums

  • Protects hard-to-reach areas – including around braces

Prevention: Chalk Teeth in Children

Chalk teeth (MIH) are a completely new challenge that many parents and dentists are facing. The molars ("M") and incisors ("I") are not sufficiently developed ("Hypomineralization"). According to current figures, over 30% of 12-year-olds show this condition of porous teeth.

A boy in a yellow T-shirt has his mouth wide open and presents his teeth, as a symbol of chalk teeth (Molar-Incisor Hypomineralization) in children

What Are Chalk Teeth?

Unlike healthy permanent teeth, chalk teeth are not fully mineralized. Normally, tooth enamel consists of approximately 97% Hydroxyapatite — a calcium-containing compound. This Hydroxyapatite is already formed while the teeth are not yet visible in the oral cavity. Many different proteins are responsible for the formation of healthy, hard tooth enamel, and these proteins do not function properly in chalk teeth.

A boy in a yellow T-shirt sits next to his mother and brushes his teeth, as a symbol of chalk teeth (Molar-Incisor Hypomineralization) in children

Causes

Unfortunately, researchers and dentists are in the dark when it comes to the exact cause of chalk teeth in children. Plasticizers in plastic are frequently cited as a cause of chalk teeth. However, infectious diseases, upper respiratory tract infections, medications such as antibiotics are also considered. Environmental toxins are also not ruled out as a cause of chalk teeth.

A scientist in a white lab coat and safety goggles holds a test tube containing white powder, as a symbol of the reduction of pain-sensitive chalk teeth with BioHAP

Treatment of Chalk teeth

Chalk teeth are uncomfortable and often painful for children. Depending on the severity, it is decided whether the teeth should be preserved, restored, or extracted. Dentists frequently apply high-concentration fluoride varnish, which is meant to protect against cavities but does not repair chalk teeth. Toothpaste with BioHAP, on the other hand, replenishes the calcium deficit and forms a protective layer of Hydroxyapatite. This not only protects chalk teeth from cavities but also reduces their sensitivity to pain.

Fluoride Monitor: News from science and the press

  • Higher fluoride levels could lower children’s IQ
  • US court calls for stricter drinking water regulation
  • Critics emphasize data uncertainties and the dental health benefits
  • Reduce fluoride intake during pregnancy

Original article: www.focus.de

  • Kennedy’s influence: As health secretary, Robert F. Kennedy Jr. is strengthening the anti-fluoride movement.
  • Court ruling: A federal judge views fluoride in drinking water as a risk to children’s intelligence.
  • Public opinion: Growing skepticism toward fluoridation due to health concerns.
  • Debate: Fluoridation has historically been seen as a success, but there is now increased discussion about its risks.
  • Health risks: Concern about negative effects on cognitive development.

Original article: www.nytimes.com

  • Kennedy’s influence: Newly appointed health secretary is addressing water fluoridation in the U.S.
  • Fluoridated drinking water: 72% of the U.S. population receive fluoridated drinking water.
  • WHO warning: Long-term exposure to fluoride concentrations above 1.5 mg/L can cause health problems.
  • Cavity protection with risks: Increased fluoride exposure can cause dental enamel fluorosis and skeletal fluorosis.
  • Fluoride during pregnancy: High fluoride exposure during pregnancy may be associated with neurological problems in children.

Original article: edition.cnn.com

  • Fluoridated drinking water: link between high fluoride exposure in drinking water and lower IQ scores in children
  • Low IQ in children: the National Toxicology Program shows that water with more than 1.5 mg/L fluoride is associated with lower IQs in children
  • Dental disease fluorosis: US authorities want to minimize risks such as the dental disease fluorosis, which is caused by too much fluoride
  • Protection of the population: the report raises questions about how people can be protected from high fluoride levels
  • Fluoride during pregnancy: pregnant women are advised to reduce their fluoride intake, as fluoride is associated with potential risks to brain development

Original article: www.theguardian.com

  • IQ report: Fluoride in drinking water can lower children’s IQ.
  • Limits: Problematic from 1.5 mg/L; 0.7 mg/L recommended.
  • Fluoridation: Used since the 1950s for cavity prevention.
  • Natural levels: 0.6% of the U.S. population have water with ≥1.5 mg/L fluoride.
  • 2015 recommendation: Levels lowered to prevent fluorosis.

Original article: www.newsweek.com

A hand holds a toothbrush onto which a stripe of toothpaste is being applied.

Fluoride Facts: What Is Fluoride?

Fluoride is a widely distributed mineral that we absorb through food and water. It is not an essential nutrient; while it protects against cavities, an overdose can quickly lead to fluorosis or other health problems.

Small dried fish, walnuts, and salt on a bright, smooth surface as a symbol of which foods contain fluoride.

How Do You Absorb Fluoride?

Fluoride is omnipresent in our daily livesᑎ: toothpaste, tea, fish with bones, fluoridated salt, seafood, mineral water, grain products.

A scientist in a white lab coat and safety goggles holds a test tube containing white powder, as a symbol of the effects of fluoride on the body.

What Does Fluoride Do to Your Body?

Since 2015, the U.S. National Toxicology Program (NTP) has been investigating the effects of fluoride on neurotoxicity and endocrine disruption. The brain responds sensitively at 1–2 mg/l, the thyroid gland at 2–4 mg/l.ᑎ

A toothbrush and a pea are placed on a bright, smooth surface as a symbol of the fact that fluoride toothpaste should only be applied in a pea-sized or rice grain-sized amount to prevent a fluoride overdose.

Why Is the Correct Dosage Important?

The correct toothpaste dosage not only protects against cavities but also prevents fluoride overdose. The official recommendation for fluoride toothpaste is: pea-sized. Studies show that parents use significantly more toothpaste.ᐳ

A girl looks questioningly into the camera and holds a toothbrush in her hand, as a symbol of the risk-free use of a toothpaste with BioHAP instead of fluoride

Prevention: Without Fluoride – Without Risk

The addition of fluoride in toothpaste is particularly controversial for children under 6 years of age. Children in particular swallow a large portion of their toothpaste.

Risk-free dosage

The uncontrollable swallowing of fluoride toothpaste can be particularly harmful to children. Therefore, the common recommendation is to use a rice grain-sized amount of toothpaste.

An overdose can cause fluorosis.

With KAREX, swallowing toothpaste is no longer a risk. Swallowing the active ingredient BioHAP is completely safe and without risk.

Two girls with healthy teeth; the girl on the left is smiling into the camera; the girl on the right is brushing her teeth with a toothbrush and a fluoride-free toothpaste with BioHAP

Fluorosis Risk

Fluoroses are unsightly white spots on the teeth that are caused by excessive fluoride intake and remain for a lifetime.

While most children's toothpastes contain fluoride, KAREX toothpaste offers a modern alternative with BioHAP. This nature-inspired active ingredient works without fluoride and reduces the risk of fluorosis.

  • Illustration of a tooth in which the tooth crown is represented by a strip of fluoride-free toothpaste with BioHAP

    Active ingredient: BioHAP – the protective shield for teeth

    • Bio for biomimetics (imitating nature) and
    • HAP for Hydroxyapatite (the main component of our teeth and bones).
  • Illustration of a tooth in which the tooth crown is represented by a strip of fluoride-free toothpaste with BioHAP; a blue protective layer and blue hexagons surround the tooth, symbolizing BioHAP’s ability to repair the enamel

    Remineralization

    BioHAP repairs the enamel and remineralizes small lesions evenly down into the underlying layers of the tooth.
    In this way, BioHAP also protects against the development of new cavities.

  • Illustration of a tooth in which the tooth crown is represented by a strip of fluoride-free toothpaste with BioHAP; a blue protective layer surrounds the tooth, symbolizing BioHAP’s ability to protect the enamel from acid attacks

    Protective layer

    The microcrystalline structure of BioHAP forms a protective layer on the tooth surface during dental care.
    Acids and bacteria cannot attack the enamel directly.

  • Illustration of a tooth in which the tooth crown is represented by a strip of fluoride-free toothpaste with BioHAP; a blue protective layer surrounds the tooth and calcium is indicated by blue squares labeled “Ca,” symbolizing BioHAP’s ability to release calcium and thus neutralize the acidic pH value in the oral cavity

    Acid protection

    During bacterial acid attacks, BioHAP releases calcium, which maintains the healthy mineralization of the enamel and reduces the tooth-damaging acidic pH value in the oral cavity.

  • Illustration of a tooth in which the tooth crown is represented by a strip of fluoride-free toothpaste with BioHAP; a blue protective layer surrounds the tooth, keeping bacteria away, symbolizing BioHAP’s effective protection against cavities

    Biofilm control

    The bacteria in the oral cavity are bound by BioHAP and prevented from forming a biofilm on the teeth – but not killed.
    In this way, BioHAP helps to keep the oral flora in its natural balance.

BioHAP is just as effective against cavities as fluoride

  • Clinical study: 291

    studies were identified that investigated BioHAP in the context of dental care.

    BioHAP is just as effective as fluoride in caries prevention.▲

  • Clinical study: 90 %

    caries-free patients while using toothpaste with BioHAP.

    The gel with BioHAP was just as effective in remineralizing caries as the fluoride-containing adult toothpaste (88% caries-free patients).◓

  • Clinical study: 100 %

    of parents use too much fluoride-containing toothpaste for their children.

    The results of the study showed that the average amounts of toothpaste used by parents were significantly higher than the rice grain-sized recommended dose.
    For toothpaste with BioHAP, there are no dosage restrictions.

  • Clinical study: 39.3 %

    of parents are not informed about the conditions of use and warnings of fluoride toothpastes.

    The study shows that parents overdose fluoride-containing toothpastes. This leads to increased fluoride intake, which can result in fluorosis.△

  • Further studies & research findings

Customer Testimonials: Experiences of our satisfied customers

  • “Our daughter really likes the toothpaste; she is very critical when it comes to toothpaste. But with the Junior toothpaste, everything is just right: design, taste, and foam formation. That’s why it gets 5 stars from us.“

    Yvonne P.

  • “Finally, a toothpaste that is fluoride-free and that our child actually likes. So no more complaining during toothbrushing; we’ll also get the toothpaste for our youngest.“

    Nadine N.

  • “A great toothpaste. My daughter (6) really likes the taste and consistency, and also the fact that the toothpaste leaves her teeth feeling smooth and clean.“

    Kristina S.

  • “Tried it on our dentist’s recommendation and are completely convinced!“

    Christian P.

A hand holds a tube of JUNIOR KAREX Toothpaste with the inscription "Toothpaste with BioHAP - fluoride-free"

Application: For morning, noon & evening

  • KAREX is the all-in-one toothpaste for clean and well-cared-for teeth
  • Application is easy as can be and suitable for all toothbrushes
  • Also for children who cannot yet spit properly
A hand holds a tube of JUNIOR KAREX and applies a strip of toothpaste to a toothbrush to illustrate the application of the toothpaste

Frequency & Duration

Brushing teeth with KAREX Toothpaste:

  • 2 x daily for at least 2 minutes
  • Use in the morning and evening & if needed at noon after the meal
  • Re-brushing by an adult is recommended until your child has mastered the brushing technique
A little girl and a boy are brushing their teeth as a symbol of the fact that toothpaste with BioHAP is safe even if swallowed

Toothpaste swallowed?

Especially young children cannot yet spit out toothpaste properly. Since KAREX Toothpastes are fluoride-free, there is no increased risk of fluorosis even if swallowed.
The active ingredient BioHAP is simply dissolved in the stomach and is safe even if swallowed.

A turquoise toothbrush lies on a light, smooth surface; in the background, white Hydroxyapatite in powder form is visible; as a symbol of the fact that KAREX Toothpaste contains only necessary ingredients and no titanium dioxide or sodium lauryl sulfate

Only necessary ingredients

Furthermore, special care was taken during the development of our toothpaste to use only necessary ingredients. Therefore, we deliberately avoid the use of sodium lauryl sulfate and titanium dioxide, for example.

FAQ: Answers to your questions

The use of fluoride in toothpaste is particularly controversial for children under 6 years of age. Children in particular swallow a large portion of the toothpaste.

Due to the intake of additional sources of fluoride (vitamin D supplements with fluoride, fluoridated salt, etc.), the risk of developing fluorosis (white spots on the teeth caused by increased fluoride intake) increases significantly. For example, the German Federal Institute for Risk Assessment points out that if a children’s toothpaste with 500 ppm fluoride is swallowed, just as much fluoride is ingested as, for instance, through fluoridated salt.

According to the new recommendations, the amount of swallowed fluoride can therefore double. The risk of fluorosis is significantly higher with toothpastes that have a higher fluoride content (from 1000 ppm).

KAREX relies on the tooth-related active ingredient Hydroxyapatite (BioHAP) in all products. When swallowed, it is simply dissolved in the stomach. Numerous studies confirm its effectiveness: Hydroxyapatite repairs enamel with every brushing, reduces bacterial adhesion, and thus provides effective protection against cavities.

Our tooth enamel consists almost entirely of Hydroxyapatite. That is why BioHAP (biomimetic Hydroxyapatite) is used as an active ingredient in oral care. The highly concentrated active ingredient also serves as a source of calcium and protects our teeth against bacterial acids. Numerous studies confirm the benefits of Hydroxyapatite in the field of oral care and prevention.

Numerous publications confirm the effectiveness of BioHAP in dental care. These include not only laboratory studies (in vitro) but also studies with test specimens under oral cavity conditions (in situ), as well as, in particular, clinical studies on patients (in vivo).
For more information, feel free to read the German short summary or the original study. You can get an overview of the large number of studies on Hydroxyapatite as an active ingredient in dental care by browsing our study database (usable without registration).

JUNIOR KAREX Toothpaste is recommended for all children from 6 years of age. The formula and mint flavor are optimally tailored to this age group’s preferences for a toothpaste and to the specific needs of the mixed dentition.

During the phase of tooth transition, the so-called mixed dentition consists of primary and permanent teeth. Both have different characteristics:

  • Teeth and dentition: primary teeth have thinner enamel, are more sensitive, and require gentle cleaning. Permanent teeth are larger and often closer together. In addition, the grooves (fissures) on the chewing surface of permanent molars are deeper. Therefore, permanent teeth have an increased risk of cavities. Dental plaque must be removed gently and effectively.
  • Fixed braces: plaque forms around the brackets and often cannot be completely removed. JUNIOR KAREX with the active ingredient BioHAP and additional calcium sources also protects hard-to-reach areas from cavity-causing bacteria and harmful acids, thus helping to prevent cavities.
  • Gums: when wearing brackets and during tooth eruption, the gums of children and adolescents can be irritated, reddened, and partially inflamed. The formulation with allantoin soothes and protects irritated gums.

More Products

Zwei Tuben KAREX Zahnschutzgel, Aufschrift: „Zahnschutzgel mit BioHAP ohne Fluorid. Biomimetischer Hydroxylapatit“.

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€17.98100 ml (€179.80 / 1 l) • incl. VAT, plus shipping
Zwei Tuben KAREX Zahnpasta, „Ohne Fluorid“ und „Wirksamer Kariesschutz mit BioHAP statt Fluorid. Biomimetischer Hydroxylapatit“.

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▲ Limeback, H., Enax, J. & Meyer, F. (2021): Biomimetic hydroxyapatite and caries prevention: a systematic review and meta-analysis. Can J Dent Hyg. 2021 Oct 1;55(3):148–159.

◓ Amaechi, B.T., AbdulAzees, P.A., Okoye, L.O. et al. (2020) Comparison of hydroxyapatite and fluoride oral care gels for remineralization of initial caries: a pH-cycling study. BDJ Open 6, 98-159

△ Sudradjat, H., Meyer, F., Fandrich, P. et al. (2024): Doses of fluoride toothpaste for children up to 24 months. BDJ Open 10, 7