The origin of the lemon isn't quite certain, but Oriental writings make mention of them being cultivated as far back as 4,000 years ago. It was brought to the New World in the late fifteenth century by Christopher Columbus, and now a quarter of the world's lemons are grown in America.
Because the heat needed for steam distillation would kill its fresh aroma, essential oil of lemon is cold pressed from the peel. It is the "limonene" in the lemon oil that gives its aroma the clean, fresh, sharpness and tang.
Antiseptic, antibacterial, and astringent, lemon essential oil is ideal for facial cleansing, but should never be used undiluted. It also brightens dull, jaded skin. Known to help with concentration and clearing of thought, this citrus oil can be a good lift to the spirits.