This didn't do much to significantly lighten my acne scars and sun spots, but I do feel like it improves the overall tone and brightness of one's skin. I use a full dropper of this at night and when I wake up in the morning (before I wash my face), my skin looks very noticeably glowy and healthy. I notice a difference in glow when I don't use this ampoule. I also appreciate that it contains ingredients like centella to calm your skin.