Neroli essential oil is derived from the flowers of the bitter orange tree; in fact, there are three oils derived from this same tree—Orange is derived from the orange peels, Petitgrain from the leaves and twigs, and Neroli from the flower. Much research has been conducted regarding the aroma of Neroli essential oil. According to research, Neroli instills relaxation, uplifts mood, and promotes overall well-being. Applied topically, Neroli may soothe the skin.