In vitro protective effects of Thymus quinquecostatus Celak extracts on t-BHP-induced cell damage through antioxidant activity

► The TQC extracts have strong antioxidant ability compared with synthetic antioxidants. ► The TQC extracts completely inhibited lipid peroxidation. ► The TQC extracts enhance the cell viability, mediation of production of ROS. ► The TQC extracts protect cell apoptosis associated with membrane potential loss. ► The TQC has the potential to protect on t-BHP-induced oxidative damage.