iS Clinical Pro-Heal Serum Advance+ is a high-strength vitamin C antioxidant serum formulated to repair and protect stressed, sensitive skin. A stabilized form of L-ascorbic acid works with olive leaf extract, vitamin E and retinol to defend against environmental damage and soothe visible redness. This cosmeceutical brightening serum improves skin clarity, balances uneven tone and smooths the look of fine lines and wrinkles. Skin feels calmer, more hydrated and revitalized with a youthful, radiant glow. Ideal for delicate, acne-prone or mature complexions, iS Clinical Pro-Heal Serum Advance+ layers perfectly under sunscreen.