This is my new AHA (I used to use Mizon 8% but stopped using it because of alcohol). I used to like my previous AHA a lot since it did a great job with CCs, cystic acne, scars ..etc but I had to buy a new one and decided that it'll be Cosrx AHA. This one saved me at first use!!! I suddenly got a huge red CC that "stood out", I thought why not use the AHA, it may help! I put it on and slept,woke up with no CC!!! (I don't believe those too perfect to be true stories but it happened to happy so I believed it lol). I was sad that I had to ditch my previous AHA but I'm happy nw that I got cosrx. I hope it works for evryone else!