Pro-Heal Serum Advance+ combines time-released 15% L-Ascorbic acid (Vitamin C) with 1% Vitamin E, 1% Vitamin A and one of the most powerful antioxidants, olive leaf extract to maximize performance. Pro-Heal Serum Advance+ offers the highest levels of antioxidant protection - eight times more than the original Pro-Heal Serum formula. It is also excellent for treating rosacea and acne (including Grade 4 cystic acne).