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. EUK 134 is one of the strongest antioxidants available. It's a derivative of superoxide dismutase and catalase that forms an exceptionally rare self-regenerating molecule that offers protection against superoxide free radicals eliminates hydrogen peroxide and converts reactive oxygen species into water and oxygen. The only issue with EUK 134 is that it must not be used immediately with strong acids such as suspensions of Ascorbic Acid. Strong acids will completely destroy the benefits of EUK 134. The Ordinary's formula does not contain any water silicones oils or alcohol. Water can impair the stability of any antioxidant. 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. Do not use with highly acidic formulations such as suspensions of ascorbic acid