Lemon Essential oil 10 ml -100% pure is one of the most commonly used oils in aromatherapy. One reason for this is that all of our oils are 100% pure and GC tested to ensure quality. Lemon essential oil is sourced from the peel of the citrus lemon plant and is used for a number of reasons ranging from anxiety to mood to weight and more. Please note that research on the health benefits of aromatherapy is limited and lemon oil is no different. There is some evidence of its benefits which make it a popular choice for many people seeking healthy, natural alternatives.