INCI · other · CIR review pending · used in 1 products
Onsen-Sui
Onsen-Sui is hot spring water sourced from Japan, used as an aqueous base ingredient in cosmetic formulations. It is distinct from regular water due to its natural mineral content derived from geothermal springs. It appears frequently in Korean and Japanese skincare products, often positioned as a premium water component.
Evidence level
weakEWG score
—Comedogenic
—Category
other● Benefits
It is claimed to have anti-inflammatory and vasodilative effects on the skin. These properties are attributed to its unique mineral composition from geothermal origins.
soothinganti-rednesshydrating
● Cautions
