STABILIZED VITAMIN C & LUMINESCINE® FACE SERUM PEARLS - STABILIZED VITAMIN C The pearls contain stabilized Vitamin C, which evens out the complexion, improves the skin's radiance, protecting it from oxidative damage and counteracting skin aging. SERUM - LUMINESCINE® The serum contains Luminescine, an active ingredient of natural origin. naturale patented, derived from the Mullein plant, with an illuminating and uniforming action.