Essential oil composition and antioxidant activity of fourteen Thymus accessions were investigated.
Thymol, carvacrol, geraniol and p-cymene were the major constituents of essential oil.
Based on bioactive components, three groups were identified in studied plants.
T. vulgaris and T. fedtschenkoi-1 possessed the highest amount of flavonoids.
T. daenensis-3, T. vulgaris and T. fedtschenkoi-3 had the highest antioxidant activity.