Product Details This is a Beyond Beauty product which means it has been sourced, tried and tested and finally declared one of the most new and innovative heroes out there. This age-defying formula from The Ordinary combines very high concentrations of two of the most powerful and important antioxidants in skincare: Resveratrol and Ferulic Acid. Resveratrol is a natural phenol found in several plants and this pure source is 100% derived from Japanese Knotweed. Ferulic Acid is a high-potency phytochemical antioxidant found naturally in walls of plant cells. ; Skincare formulations generally incorporate Resveratrol at 1% or less and Ferulic Acid at 0.5% or less. This formula contains each at 3% an exceptionally high concentration. How To Use Apply alone or after water-based serums before oils or heavier creams. Alternatively mix with other treatments to enhance their antioxidant capacity significantly. This product can be mixed with The Ordinary Vitamin C Suspension 23% + HA Spheres 2% or