A hydrolate is an aqueous extract that is obtained through a steam distillation process. Different parts of the plant can be used: flowers, leaves, stems, roots, etc. What is Bio Terpenic Labs Linden Hydrolate? It is known for being taken in infusions as it has antispasmodic, somniferous and anxiolytic properties. In topical application it stands out for its tonic and regenerating action for mature or very dry skin. It also stimulates hair growth. Hydrosols are ideal for use on sensitive skin, since it is not necessary to add perfumes. External use. Hydrosols can be used as an excipient or as a cosmetic active ingredient. BIO hydrolate for cosmetic use, 100% pure without additives.