iS Clinical Pro-Heal Serum is an antioxidant that combines time released vitamin C with a blend of botanicals to treat acne, rosacea, contact dermatitis and even insect bites. This powerful, healing serum contains olive leaf extract works with the vitamin C (L-ascorbic acid) to provide maximum antioxidant protection and health-promoting benefits. Zinc sulfate reduces inflammation, kojic acid prevents blemishes and vitamins E and A condition, nourish and neutralize free radicals. Pro-Heal Serum Advance+ offers iS Clinical's highest levels of antioxidant protection, making it ideal for sensitive, compromised and sickly skin types.