INCI · other · CIR review pending · used in 21 products
Purified Water
Water (INCI: Aqua) is H2O and the most common skincare ingredient, typically appearing first on ingredient lists. It primarily functions as a solvent for water-soluble ingredients. The water used in cosmetics is purified and deionized, meaning nearly all mineral ions are removed to improve product stability over time.
Evidence level
strongEWG score
—Comedogenic
—Category
other● Benefits
Water acts as a solvent for ingredients that do not dissolve in oils. Once inside the skin it contributes to hydration, though applying pure water topically (e.g., prolonged baths) can actually be drying rather than hydrating.
hydrating
● Cautions
Applying pure water directly to skin for extended periods (e.g., long baths) can be drying rather than hydrating.
