Hydrated Silica
Also known as: silica, silicon dioxide
The usual gel-paste abrasive/thickener; safety depends on abrasivity, not the word 'silica' alone.
01. What it is
What it is
Amorphous silica used to thicken and polish.
02. Why it’s used
Why it’s used
Cleaning and structure in modern pastes.
03. The concern
The concern
High relative dentin abrasivity (RDA) formulas can contribute to wear with aggressive brushing; crystalline silica (different material) confuses shoppers.
04. Our take
Our take
Caution means 'check the whole formula and your brushing habits,' not automatic avoidance. Most clean nHAp pastes use it.
05. Found in
Brands we reviewed
These ranked pastes list or rely on this ingredient in the formula we evaluated.
- Boka Ela Mint Nano-Hydroxyapatite Toothpaste
Rank #3 · Score 87
- Fygg Nano-Hydroxyapatite Toothpaste
Rank #2 · Score 87.5
- Wellnesse Whitening Toothpaste
Rank #6 · Score 82.2
- Hello Antiplaque + Whitening Fluoride Toothpaste
Rank #7 · Score 78.3
06. Sources
Further reading
Third-party citations, not studies we ran.