Neutrogena Stubborn Marks PM Treatment visibly diminishes post-acne marks. This potent treatment features Retinol SA, which helps to renew skin and accelerate surface cell turnover. Designed for nighttime use, the formula works while one sleeps to improve skin texture and clarity. It fades the look of lingering imperfections, revealing a more even-toned complexion. With consistent application, skin appears smoother, brighter, and noticeably free of stubborn marks.