The Ordinary EUK-134 is a serum containing the trademarked synthetic antioxidant known as Ethylbisiminomethylguaiacol manganese chloride. It mimics two enzymes naturally present in skin, superoxide dismutase, and catalase. This means it can act as a powerful antioxidant to fights free radicals, particles that damage cells and lead to visible signs of aging, reduce redness, and protect against UV related skin damage. …