C&E Strength Max is a combination of pure 20% L-ascorbic acid (vitamin C) and 5% tocopherol (vitamin E), designed to deliver maximum results. These proven antioxidants work synergistically to protect the skin while boosting collagen production and improving the signs of photodamage. Daily use of this anti-aging formula in conjunction with the appropriate PCA Skin® broad spectrum sunscreen provides optimal skin protection.