2 weeks ago I got a 60% glycolic peel and my left cheeks is a little scared (I believe I burned because I did not stop my retin-A long enough). I have been using Obagi system and have had success. I was interested in trying the Advanced Melanin Repair Serum ( an alternative to hydroquinon) but had a couple of questions. Can this serum be used in combination with retin-A like the Obagi system or does it work alone? and how fast will I see the results? I am36 y/o hispanic and my skin tends to scar easily, but they fade and go away. I have never had problems like melasma. I used hyroquninon to help with evening out my skin and fading away any small zit scarrings that occur occassionally.