I was given a sample of this to try for 4 weeks. This serum really does deliver results within a few weeks. There was a noticeable difference even after one week of use. I have tried many non-prescription products out there to help treat PIH over the years and none were as effective even after finishing full bottles.
I did make the mistake of using it daily at the get go which led to some irritation/redness. When I backed down the frequency to three times a week, the redness went away. Definitely start off slow to allow your skin to acclimate to the product. After 4 weeks of regular use, the dark spots have faded significantly (see pics).
So appreciate that this product contains so many effective ingredients in one formulation, so I don't need to use multiple products which gets costly and time consuming. The texture is light weight and absorbs well. There's no fragrance which is important since my skin is sensitive. Looking forward to results from using this serum continually long term.