To date, hydrosols are mainly used as cosmetic agents. Only recently hydrosols attract more attention in the aromatherapy research field.
A research conducted in 2008 by S. Inouye, S. Abe and M. Takahashi from the Teikyo University Institute of Medical Mycology in Japan focused on the composition of forty four hydrosols and their essential oils. A comparison of the composition was made based on gas chromatographic analysis using solvent extraction.
