I am disappointed I bought this product. I hoped that it would exfoliate the skin, thus aiding in the fading of post acne marks. Unfortunately I experienced no results with this, even when I used it every night for several months. This led me to searching reviews online to see what others have experienced. I found out on Paula's Choice that this product contains so little glycolic acid that it's ineffective, and the pH is not in the range that would allow the acid to work properly on the skin even if there was enough of the acid. This explained why I was experiencing no results. The grapefruit and aloe vera in the product doesn't help my acne either (which one thinks it would), which makes me wonder if this product is simply 99% water. This is a large waste of money. When I use this, nothing happens and my skin is the same as when I don't use it. I still have the majority of the bottle and don't think I'll ever be able to finish it up because it's an unnecessary step that doesn't benefit my skin at all. If you are looking for a product to exfoliate with glycolic acid, try Ren's Glycol Lactic Radiance Renewal Mask. That product actually works and results in bright skin. Don't waste your money on this!