I use this product at the same time as the numbuzin no3 serum so I'm not sure which product is working, but my skin is noticeably brighter, smoother, and less bumpy! Lowkey see some dark spots fading too! Today my friend whom I haven't seen ever since I started using this product (more than 2 weeks) told me my skin looks so much better! She even said I'm about to achieve Korean glass skin lmao.