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Prescription of high fluoride toothpaste: need, mechanism, and alternatives

In most countries, the maximum dose of fluoride toothpaste available to buy over the counter is 1,500ppm, with this upper limit seen as sufficient for the general population. However, in some cases, clinicians may prescribe their patients toothpaste containing a much higher dose of fluoride – usually 2,800ppm, or 5,000ppm – if they are concerned about their oral hygiene, or risk of oral diseases, such as caries.

Prescriptions of higher dose fluoride toothpaste are normally a short-term intervention for patients at higher risk of caries. Occasionally, high doses are recommended for long-term use, for people with physical or learning disabilities for instance.[i]

Whilst they can be an effective solution in some cases, it’s important that clinicians are aware of the reasons why these are prescribed, the mechanism of action, as well as potential alternatives for those who need extra support in their oral hygiene routines in the long-term.

High dose fluoride toothpaste: when is it required, and what does it do?

Intended for used for approximately three months, high dose fluoride toothpastes work by delivering a large amount of fluoride to the mouth over a short period of time, with an absorption window of around two minutes and several weeks required to achieve maximum effect.[ii] The protective benefit is therefore dependent on how much fluoride remains available in the oral environment after brushing, which can vary significantly depending on patient behaviour, rinsing habits, salivary flow, and compliance.
Whilst they may be prescribed to very high-risk patients, these products are not generally intended for long-term use, except in specific clinical circumstances, as they provide a short, high-concentration fluoride exposure rather than sustained availability over time. Without addressing underlying risk factors such as frequent sugar intake or dry mouth, long-term reliance on high-dose fluoride alone may offer diminishing benefit, and requires careful consideration of cumulative exposure and ingestion risk.[iii]

Other ways to support enamel health in high-risk patients

If the goal of high fluoride prescription toothpaste is to maximise fluoride availability at the tooth surface, an interesting clinical question emerges: is there a way to maintain a low level of fluoride, calcium and phosphate ions in the oral environment for longer periods of time, rather than delivering them in a single high-dose event during brushing?

Bioactive glass is one such technology that can support this approach. When applied in dentistry, this type of technology is ideal for patients experiencing dentinal hypersensitivity and early decay. The bioactive material dissolves in saliva, causing a pH rise – this promotes the precipitation of hydroxyapatite, which is the main component of mineralised enamel and dentine. When fluoride is added to the formula, fluorapatite is precipitated onto the tooth surface, rather than hydroxyapatite, offering increased resistance to acid and more effective occlusion of dentinal tubules to reduce sensitivity.[iv]

For patients who require ongoing support alongside, or following, the use of high dose fluoride toothpaste, BioMin® F toothpaste is very effective for strengthening enamel and reducing dentinal hypersensitivity. This is because it contains low level fluoride (530ppm), which is built into bioactive material that gradually dissolves when it comes into contact with saliva – releasing fluoride, calcium, and phosphate ions over 10-12 hours when it is needed most, rather than in one burst which is then washed away.

This process forms a strong, acid-resistant mineral layer on the surface of the teeth, and occludes dentinal tubules, offering patients a prolonged and targeted solution for sensitivity and weakened enamel.

The science is clear. The solution is simple.

biomin.co.uk 

2026 Supply Update

BioMin® F, BioMin® C, and BioMin® F for Kids are currently unavailable across many of our usual stockists. This pause ensures we continue to meet the highest standards of quality and regulatory compliance for all our products.

We understand that this may be inconvenient, and we sincerely appreciate your patience and support during this period. We are working hard behind the scenes to resolve the situation and will share updates on our website as soon as we have a clearer timeline.

Thank you for continuing to trust BioMin® for your oral health needs.

[i]  Nassar Y, Brizuela M. The Role of Fluoride on Caries Prevention. [Updated 2023 Mar 19]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK587342/
[ii]  Prescription Doctor. How long does Colgate Duraphat take to work? Accessed Jan 26. https://www.prescriptiondoctor.com/dental-care/duraphat-5000/how-long-does-colgate-duraphat-take-to-work
[iii]  Gov.uk. Chapter 9: fluoride. Accessed Jan 26. https://www.gov.uk/government/publications/delivering-better-oral-health-an-evidence-based-toolkit-for-prevention/chapter-9-fluoride
[iv] Dai, Lin Lu et al. “Mechanisms of Bioactive Glass on Caries Management: A Review.” Materials (Basel, Switzerland) vol. 12,24 4183. 12 Dec. 2019, doi:10.3390/ma12244183