When my very much not teenage skin wigged out this summer, this is one of the products that went into my daily skin care routine. It would mattify for several hours and seemed to calm my skin down. It seems to do its best work at night, when your body has time to "heal" itself. A little bit of this product really does go a long way. You can tell that you have used too much when you try and layer on another product, like sunblock and it seems to "shed".