Demineralised (deionised) water is purified water with mineral ions removed, used as the primary solvent and carrier in many cosmetic and skincare formulations. It dissolves water-soluble ingredients and provides the aqueous phase of emulsions.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Very rare | Water itself is essentially inert; irritation is not attributable to the water component. |
Allergic reaction | Very rare | No meaningful allergenic potential; reactions reflect other formulation ingredients. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.