TET8 patented technology (Caudalie x Harvard Medical School) 10 years of research with Harvard allowed Caudalie to patent this revolutionary technology, associating resveratrol with honokiol (green extraction of magnolia). It visibly improves the look of 8 signs of aging. Viniferine This ingredient patented by Caudalie is a natural extract derived from vine sap and is 62X more effective than vitamin C*. *In vitro test on the inhibiting action of Viniferine on tyrosinase.