INCI · other · CIR review pending · used in 1 products
Water/Eau
Water (Aqua, H2O) is the most common cosmetic ingredient, typically appearing first on ingredient lists, indicating it is the largest component by volume. It functions primarily 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 incorporated into a formulation, it contributes to skin hydration; however, applying pure water topically (e.g., prolonged bathing) can be drying rather than hydrating.
hydrating
● Cautions
Applying pure water directly to skin (e.g., long baths) can be drying rather than hydrating.
