- Brightening serum formulated with powerful, antioxidant-rich enzymes to protect and restore skin - skin firmness, evenness and radiance - Contains 20% L-ascorbic acid and revolutionary Extremozymes - Suitable for all skin types . iS CLINICAL GenexC Serum  PROTECTIVE, REGENERATIVE, AGE-DEFYING  Clinically proven brightening serum formulated with powerful, antioxidant-rich enzymes to protect and restore skin. GENEXC SERUM contains 20% of iS Clinicals exclusive L-ascorbic acid (Vitamin C), which is formulated with a powerful combination of botanically sourced enzymes, antioxidants, and fruit acids sourced from both land and sea. The revolutionary formula features Extremozymes®, which are clinically proven to help protect and revitalise the foundation of healthy skin, as they stimulate the genes associated with ageing, hydration, and multi-level protection. These cutting-edge ingredients work synergistically to provide the most scientifically-advanced, clinically proven bene