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6.1. Antioxidant Activity

Given the fact that chemical compounds belonging to the sesquiterpene group are well known for their antioxidant properties [,], perhaps antioxidant activity may be expected from nerolidol. Furthermore, EOs containing nerolidol derived from medicinal plants were found to exhibit antioxidant activity, suggesting its plausible utilization as an antioxidant agent. Indeed, it has been demonstrated that nerolidol exhibits potent antioxidant properties in counterbalancing the effect of ROS by protecting the cells against oxidative damage to lipids, proteins and DNA [,,]. According to a study conducted by Vinholes et al., the antioxidant activity of cis-nerolidol was evaluated using 1,1-diphenyl-2-picrylhydrazine (DPPH) radical scavenging assay. The study revealed that cis-nerolidol exhibited DPPH scavenging activity []. In another study, cis-nerolidol was found to possess higher scavenging activity towards hydroxyl radicals with IC50 measured at 1.48 mM []. Due to the ability in scavenging several types of free radicals, cis-nerolidol was evidenced to protect Caco-2 cells against oxidative stress induced by tert-butyl hydroperoxide (tert-BuOOH), suggesting that nerolidol is a good antioxidant that exerts protection against oxidative damage []. Another study conducted by Vinholes et al. reported that cis-nerolidol mediated its strong antioxidant activity in protecting the hepatocytes through the inhibition of lipid peroxidation induced by tert-BuOOH, thereby 1mM of cis-nerolidol resulted in 36.50% ± 4.47% of malonaldehyde (MDA) reduction [].