Hydrosols are aromatic waters formed as by-products of essential oil steam distillation. Also known as hydrolates and herbal distillates. Hydrosols contain plant acids and other water-soluble substances derived from the plant material being distilled. Their astringent properties constrict and contract the tissues while the aromatic components infiltrate our sense of smell. In the beauty industry, hydrosols are mixed into creams and lotions, used on their own as facial mists and toners, and added to various products instead of water to give it a natural fragrance. Hydrosols, especially rose and lavender waters, are commonly used in cooking and are very popular in the dessert and confectionery industries. Other common hydrosols include: Immortelle, Witch Hazel, and Peppermint.