Ingredients

Abrasive · On 37 of 50 labels

Hydrated silica in toothpaste.

Quick answer

Hydrated silica is an abrasive and thickener. It polishes off plaque and surface stain as you brush. It was on 37 of the 50 toothpaste labels in Klyyr's 2026 Transparency Report, more than any other abrasive. It is amorphous silica, a different material from crystalline silica, the dust that damages workers' lungs when inhaled.

The useful question is abrasivity, not the ingredient name. How abrasive a paste is depends on the silica grade, the amount, and the rest of the formula. That is measured as RDA. Klyyr One+ lists no silica and publishes RDA 62.

  • 01

    Amorphous, not crystalline

    The silica linked to silicosis is crystalline dust breathed in at work. Toothpaste silica is amorphous and wet.

  • 02

    Abrasivity is the real question

    A silica paste can be gentle or harsh. The RDA number tells you which. Most brands don't publish it.

  • 03

    One+ leaves it out

    One+ has no silica. It still has an abrasivity number: RDA 62.

Topic What is known The record Klyyr One+ On the label
What it is Amorphous silicon dioxide with bound water Not listed
Job in the paste Abrasive, polisher, and thickener Thickened with cellulose gum and xanthan gum
How common 37 of 50 labels. Plain silica on 10 One of the 13 without hydrated silica
Crystalline silica An inhalation hazard for workers. Not what toothpaste uses Not relevant
Abrasivity Depends on grade and amount. Measured as RDA RDA 62, published
ADA ceiling RDA 250 for Seal-accepted toothpaste 62 is under that ceiling
As a food additive FDA permits silicon dioxide in food up to 2% by weight Not applicable

Label counts come from the 50-product 2026 Toothpaste Transparency Report. The ADA ceiling comes from the ADA Seal program. One+ facts come from its current label.

Sources behind this answer

These sources separate the two kinds of silica and set the abrasivity ceiling. None of them measured One+.

  1. Klyyr Labs · 50 labels · 2026

    Toothpaste Transparency Report

    Klyyr recorded the printed label of 50 toothpastes, including One+, under one set of published rules. The ingredient counts on this page come from that sample.

    Read the Transparency Report

  2. Occupational Safety and Health Administration

    Crystalline silica

    OSHA regulates respirable crystalline silica, the fine dust produced by cutting stone, concrete, and similar materials. Its hazard is inhalation at work.

    Read OSHA's crystalline silica page

  3. 21 CFR 172.480

    Silicon dioxide as a food additive

    FDA permits silicon dioxide as an anticaking agent in food at no more than 2% by weight. Toothpaste is not food, but this is the same family of amorphous silica.

    Read the regulation

  4. American Dental Association

    ADA Seal of Acceptance

    Toothpastes with the Seal must have an RDA of 250 or less. Seal-accepted toothpastes that claim cavity protection must contain fluoride, and sugar is not permitted.

    Read about the ADA Seal

How to choose

If you have exposed roots or sensitivity

Abrasivity matters more for you than the ingredient name. Pick a paste that publishes a low RDA and ask your dentist. See the RDA chart.

If you're avoiding silica on principle

Read the label for hydrated silica, silica, and silicon dioxide. One+ lists none of them.

If you want stain removal

Silica pastes polish surface stain. One+ makes no whitening claim.

The Klyyr One+ formula

One+ is fluoride-free toothpaste with a clearly disclosed 10% nano + micro hydroxyapatite blend, 16 listed ingredients, peppermint + spearmint, no SLS, and no artificial dyes.

  • 01

    10% hydroxyapatite

    Combined nano + micro hydroxyapatite, disclosed on the label. Ten percent is not a universal efficacy threshold.

  • 02

    16 listed ingredients

    Water, Sorbitol, Glycerin, Potassium Sorbate, Hydroxyapatite (nano & micro), Xylitol, Sodium Cocoyl Glutamate, Cellulose Gum, Xanthan Gum, Zinc Citrate, Aloe Vera, Mentha Piperita (Peppermint) Oil, Mentha Viridis (Spearmint) Leaf Oil, Menthol, Sodium Benzoate, Stevia Rebaudiana Leaf/Stem Extract.

  • 03

    What is not in it

    0 ppm fluoride. No SLS. No artificial dyes. Sodium cocoyl glutamate is the surfactant.

  • 04

    120 g aluminum tube

    4.23 oz, approximately 90 brushings. Aluminum tube, HDPE cap. Recycle where accepted locally.

In short

Hydrated silica is a common, well-understood abrasive. It is not the silica that harms lungs. Judge a paste by its RDA, not by whether silica is on the label.

01 Is hydrated silica safe in toothpaste?

Hydrated silica is amorphous silica, used in toothpaste for decades and on 37 of the 50 labels Klyyr audited. The silica tied to lung disease is crystalline dust inhaled at work. For enamel and roots, the question is the paste's abrasivity, measured as RDA.

02 Does hydrated silica damage enamel?

It depends on the grade and amount, which set the paste's RDA. ADA-accepted pastes must be RDA 250 or lower. Few brands publish their number. One+ publishes RDA 62.

03 What is the difference between silica and hydrated silica?

Both are silicon dioxide. Hydrated silica carries bound water and is the usual toothpaste abrasive. Labels also print silica or silicon dioxide.

04 Does One+ contain silica?

No. One+ lists no hydrated silica, silica, or silicon dioxide. It is thickened with cellulose gum and xanthan gum.

Read the full FAQ →

Shop

One tube. Pick the question you came with.

One+ is the only product in each collection. Pick the page that matches what you came for.

  1. 01 Silica-free toothpasteNo hydrated silica on the label.
  2. 02 Low-abrasive toothpasteRDA 62, published.
  3. 03 Minimal-ingredient toothpaste16 ingredients, all listed.
ONE+
No silica on the label. RDA 62 published.
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