Orange essential oil is extracted from the fruit peels of sweet orange that goes by the name Citrus sinensis. It is a natural product commonly used in aromatherapy. It contains the aromatic compounds of the sweet orange plant. According to aromatherapy practitioners inhaling essential oil molecules (or absorbing essential oils through the skin) transmits messages to the limbic system (a brain region responsible for controlling emotions and influencing the nervous system). These messages are believed to affect biological factors such as heart rate stress levels blood pressure breathing and immune function.