Our toothpaste tablets use 10% nano hydroxyapatite, the concentration research identifies as needed to support remineralisation without the systemic exposure concerns of fluoride.
For years, the word "nano" has been used to scare people away from nano-hydroxyapatite, often by brands that simply do not use it. The EU's own safety regulator disagrees, and the gap just got bigger.
In March 2023, the Scientific Committee on Consumer Safety (SCCS) set the safe limit for nano-hydroxyapatite in toothpaste at 10%. In June 2025, after reviewing further safety data, it raised that limit to 29.5%, nearly three times higher.
Three benefits the research consistently points to, and how the mineral gets there.
Hydroxyapatite makes up roughly 97% of tooth enamel by weight. Because nHAP particles are the same mineral, the tooth surface integrates them directly rather than coating over the area.
At nano scale, particles are small enough to sit inside early demineralised areas and exposed dentine channels, the structures linked to sensitivity, rather than only sitting on top of the surface.
Consistent twice daily use builds a smoother, more mineral dense surface over time, which is more resistant to the acid attacks that lead to future sensitivity and cavities.
We are not here to tell you fluoride does not work. We are here to show you why we chose a different mineral, so you can make your own call.
Not all nano hydroxyapatite is equal. The prevailing assumption is that 10% is the minimum effective concentration, but research increasingly points to particle quality as the bigger variable.
Our nHAP is rod shaped, with a median length of 27.6 nanometres and width of 15.4 nanometres, well below the 1.3 micrometre adhesion threshold identified in the research literature [Study 10]. The particles are uncoated, not surface modified, and contain no needle shaped structures.
This matters because particles above that threshold simply cannot bind to the enamel surface as effectively, regardless of how high the headline concentration number is.
Engineered to a recognised safety standard, particle size, shape, aspect ratio and composition designed to meet the EU safety committee's specification for nano-materials in oral care.
Synthesised, not milled, produced in aqueous solution for precise, consistent sub-50 nanometre particles, rather than ground from bone, eggshell, or salt-phosphate reactions.
Well below the adhesion threshold, research shows HAP particles above 1.3 micrometres have limited enamel adhesion. Ours measure a median 27.6 nanometres in length.
RDA (Relative Dentin Abrasivity) is the standard scale dentists use to measure how much a toothpaste wears down enamel with daily brushing. The lower the number, the gentler the formula.
Most everyday toothpastes sit between 30 and 160 RDA. Regulatory guidance treats anything under 250 RDA as safe for daily use. MGR Toothpaste Tablets measure 21.38, gentle enough for sensitive teeth, daily use, and long term enamel health.
Across the published in vitro literature, 10% nano hydroxyapatite consistently performs at or above the level of fluoride toothpaste for enamel remineralisation.
Tap any ingredient to see what it does and what it replaces.
"I am selective about what I put my name to. When I reviewed My Green Routine's formulation, I found it aligned with what I actually recommend in clinical practice. The nHAP at 10%, xylitol at therapeutic concentration, no SLS, no preservative load, no plastic. That is not a standard many products in this category meet. I would give these to my own family. That is the only standard I apply."Marc Mortiboys · The Dental Shaman
10% nano hydroxyapatite. Zero fluoride. RDA 21.38. The rest is your call.
Shop The Toothpaste TabletsPrimary peer reviewed and regulatory sources first, secondary summaries marked separately.