NIB. From the Elemis website: "Reveal a complexion that looks fresh, youthful and rejuvenated with this innovative line-refining peel. Formulated with an 8% Tri-Acid Complex of Lactobionic, Asiatic and Mandelic Acids, it lifts away dull and dead skin cells for a smoother and renewed-looking appearance. The concentrated formula is clinically proven* to reduce the look of fine lines and wrinkles whilst improving the appearance of skin tone and luminosity."