Latin Name : Citrus Limon. Part Of Plant Used : Fruit Peel Source : Italy. Extraction Method : Cold Expression. Lemon Essential Oil has a sharp, fresh smell and is extracted from the fresh lemon fruit peel by cold expression. This oil is refreshing to the mind, and sharpens concentration, so it is often preferred in room fresheners for offices and banks. It is believed to help with rheumatism, arthritis, and gout. It has been used to cure skin troubles like abscesses, boils, carbuncles, and acne. It boosts the immune system and cleanses the body. When used in an oil burner (a few drops in water), the vapours of lemon oil are used for colds, laryngitis, headache, and flu.