biological activities, such as analgesic, antihypertensive and antiedematogenic activity. 9 This species has been known as a remedy for upper respiratory tract ailments. Nowadays, horehound is used in herbal medicine for treatment of liver diseases, biliary tract disorders, and for increasing the appetite and supporting the function of the stomach. M. vulgare L., is reported to possess antioxidant activity, 10 and also as anti-inflammatory, 11 hypoglycemic 12 and vasorelaxant. 13 The essential oils from M. vulgare L. was already studied and showed a good antioxidant effectiveness, 14, 15 nociceptive, 16 antibacterial, 17 antifungal. 18 Nevertheless, there are few information on the antioxidant properties of horehound leaves essential oils. Moreover, there is no report on the chemical composition and antioxidant activity of the essential oils of horehound leaves from Morocco. Currently, the use of synthetic substances has been restricted in food because of its carcinogenic effect. Therefore, the search for new natural antioxidant sources has been greatly intensified. In the same context this study was performed to determine the chemical composition of the essential oils of M. vulgare L. leaves from Morocco and to evaluate their antibacterial properties and antioxidant activity.
Materials and MethodsPlant material M. vulgare L. (Lamiaceae) used in this study have been collected between May and June 2019 in Fez-Morocco 34°03'50.1"N 5°02'13.3"W, and identified by Pr. Amina BARI botanist at the Sidi