Antioxidant and cytotoxicity activity of a nanoemulsion from Satureja kermanica (Lamiaceae)

•Phytochemical studies exhibited the presence of a wide range of secondary metabolites including flavonoids, tannins, steroids and carbohydrates in the plant.•Both methanolic and nanosized plant extracts (MSK and NSK) showed dose-dependent antioxidant and cytotoxic activity.•The results indicated that in nano-size extract, antioxidant and cytotoxicity effects was dramatically increased.