In a Skin Research & Technology study, spraying fine water particles onto the facial skin of adult women in winter, when skin is dry, improved skin hydration and softening. In addition, water retention remained constant at 360 minutes after spraying.
The benefits occurred because the diameter of the sprayed fine water particles was smaller than the intercellular spaces in the skin, and the particles were non-charged. Typical steam and mist humidifiers generate larger water particles and increase indoor humidity that can promote mold growth.
The findings indicate that sprays of non-charged fine water particles may help moisten skin in low humidity environments.