Lavender essential oil, cultivated in Louvre Kozani by the producer Vasilis Tzimtsos and available from Levantashop.gr, is a product of organic farming certified by Bio Hellas. Dry lavender has calming qualities and is used to reduce anxiety, hypertension and treat minor depression. Herbalists believe that lavender extract can be used to treat migraine and insomnia. Other researchers believe that a cup of lavender flowers tea combats insomnia.