Lemon is a fruit that belongs to the citrus family. Its origin remains unknown. Its history goes back about 3000 years when it was discovered in the forests of the Himalayas. The Hebrews and the Greeks used lemons in religious practices in antiquity, but Europeans were not aware of them until the fourth century. A fruit with juicy, acidic flesh rich in vitamin C that can also be easily stored, lemons have been disseminated around the world by sailors who used it to prevent scurvy. From the bark essential oil is extracted that is used in agri-food and cosmetics. The main producing countries are Mexico, Argentina, Spain and Italy.