it works [SEP] I originally thought this was a counterfeit product because after the first use it didn't tingle or have a slight burn like other glycolic acid products I've used. I even reviewed it badly. I am now editing my review to say that the second time I used, it tingled A LOT. You know that slight burning feeling? I used it the next 3 or 4 days and my face started to flake so I took a break. Now I only use once a week. It will literally exfoliate your pimple scars off but use with caution. It can be irritating until your skin gets used to it. I don't like the flaking but that's a small price to pay for clearer skin.