Advanced Retinol Serum 3Retinol, a form of vitamin A, is an important part of our recommended skincare regimen. It will improve the skins texture and appearance while stimulating collagen production to strengthen skin. Our unique retinol serum utilizes a patented delivery formulation to ensure that the retinol is absorbed deep down into the skin where it can do the most good. A clinically proven pure and active retinoid, it helps to improve the look of lines, wrinkles,