UAE has also been developed for essential oil from aromatic plants such as peppermint leaves [186], artemisia [187] and lavender [188], or from other vegetal matrix such as garlic [189] and citrus flowers [190]. Increased yields of essential oil were found for peppermint leaves (up to 12%) and for artemisia when using UAE, and increase by 2 to 3-fold of the main compounds of lavandula essential oil when comparing UAE to conventional distillation. Moreover, UAE not only improved yields but as the method is fast and run at low temperature, the final product usually showed less thermal degradation than traditional methods