Purified water is a highly filtered, deionized water used as the primary solvent and base in most skincare formulations. It dissolves water-soluble ingredients and provides the medium in which other components are dispersed.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation or sensitivity | Very rare | Purified water is essentially inert; reactions are attributable to other formula components, not the water itself. |
| Transient skin barrier disruption from excessive exposure | Rare | Prolonged or repeated wetting can contribute to mild barrier compromise, but this relates to usage patterns rather than the ingredient. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.