I originally bought this by chance. I have had hyperpigmentation across my back from old acne for several years now, sometimes I forget about it, but then you look at a nice slinky dress and remember. I've tried many treatments chemical peels, tretinoin, hydroquinone so I wasn't expecting much. However after three weeks (of not very diligent use!) I could see results. The stubborn marks on my shoulders and back had noticeably faded - even under bright lights my skin looks more even and clear, the mottling fading. Now I'm applying this regularly and just got a second tube - I can't believe it works, I had almost resigned myself to no slinky tops for life! Now I'm going to have clear skin right in time for summer, thank you Topicals!