Fine Retinol serum with 2.5% retinol

I've been using this serum every evening for a little month now on cleansed skin. I notice that my skin has become much calmer. I have hardly had to suffer from purging and I didn't really have to build it up either. Where my skin was already even, it is even more even now and my T-zone is calmer even though the dilated pores haven't disappeared of course. I am very satisfied, especially at this price

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