Inspired by the unique power of pearls and enriched by the latest technological advances, Guerlain Research invented the Advanced P.E.A.R.L. Complex to permanently target both stubborn and recently-formed melanin and prevent future formation in the key layers of the skin, from the basal layer to the surface. Thanks to this Melanin Control Technology, stubborn dark spots lose their intensity, recurrent and future dark spots are deactivated, and the skin glows with perfection. This is the first ultra-fresh day and night shock treatment that delivers intensive and continuous whitening power for 28 days. It re-balances the whiteness and evenness of the skin. The skin regains and retains the immaculate whiteness of the pearl.