Vichys Mineralizing Thermal Water is born in the French volcanoes and travels to depths of up to 4000 meters before it is heated to 140C and thrust up to the surface. Over the course of its thousand-year journey, it absorbs 15 minerals which give the water its power.With 11 tests and 5 clinical studies, Vichys Mineralizing Thermal Water has been clinically proven to strengthen the skins barrier function and help accelerate surface skin cell renewal.. A 100% pure, natural active ingredient, hypoallergenic, fragrance-free, no preservatives.