Lemon (Citrus Limonum) – Containing citric acid and B vitamins, lemon oil is effective at moisturizing, toning and purifying the skin. Lemon oil can reduce the appearance of age spots, fine lines and wrinkles. Lemons are believed to have originated from India, north Burma and China. Lemons contain vitamin C, citric acid, B vitamins, carbohydrates and a small quantity of protein. The citric acid in lemon juice can help to peel away the surface layer of your skin and provide a mattifying effect. Lemon extract helps to tone the skin and remove dead cells, leaving behind the fresh, youthful skin beneath.