Neostrata Skin Active Skin Active Retinol + NAG Complex Night Serum 30 mlNEOSTRATA Retinol + NAG Complex contains 0. 5% pure, stabilized retinol and NeoGlucosamine. Their interaction helps build their own collagen, and their combined effects are much stronger and more intense than those of retinol alone. The skin is filled and firmed and the lines are smoothed from the inside. In order to achieve maximum stability, retinol carries special, slow release microcapsules, which results in a high tolerance of this strong and