Aqua Demineralisata (demineralised or purified water) is the most common base ingredient in skincare formulations, serving as a solvent that dissolves other ingredients and provides the medium for emulsions and aqueous phases. It has no active therapeutic effect on the skin itself.
| Reported effect | How often | Notes |
|---|---|---|
| Irritation or sensitivity reaction | Very rare | Purified water is essentially inert; any reaction is typically attributable to other ingredients in the formulation rather than the water itself. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.