Ingredient
Potassium Nitrate
A sensitivity-reducing agent commonly paired with peroxide.
How it works. Diffuses through dentin and calms nerve response inside the tooth.
Advantages
- Well-established for sensitivity relief
- Compatible with peroxide
Potential disadvantages
- Requires ~2 weeks of continuous use to plateau
Common concentrations. ~5% in most sensitivity toothpastes.
Safety. Considered very safe at label doses.
Evidence strength. Strong