I used this before I found this on sale and had heard a lot of good things about alpha-hydrox and glycolic, so I decided to try this brand. It didn't turn out quite like I expected. First, this really irritated my skin and left red rashes on my face. I followed the directions exactly, and actually used it less than what was recommended. I found that some people are sensitive to some of these ingredients. I'm not sensitive to anything else that I know of, so I don't understand why I had such a bad reaction to this. I started using it less and that didn't help so I had to discontinue using it and use Silvadene for the reaction, luckily I still had an unused bottle of it I never used. Effectiveness This may work for some people, but not for everyone. I would caution anyone when using these types of products. I don't have sensitive skin and it irritated and caused my skin to redden and burn. I wouldn't recommend it for those with sensitive skin, or anyone that has excessively dry skin.