Effects of different essential oils on HaCat keratinocytes against hydrogen peroxide induced oxidative stress

The effect of different concentrations of common juniper, oregano, laurel, lavander, sage and myrtie essential oils on human skin cell HaCat in vitro was explored. This study has demonstrated that all essential oils were cytotoxic to human keratinocytes in vitro at a concentration of 1% (v/v). At a concentration of 0.1%, all essential oils, with the exception of Laurus nobilis L., were still irritating. At lower concentrations all essential oils showed no toxicity and no protective effect on HaCat human keratinocytes from oxidative stress induced by exposure to hydrogen peroxide.