My skin has become beautiful! Oil-based serums often dry out or don't suit me, but this one, even though it's a two-layer formula, worked perfectly. I was worried that my skin suddenly looked different when I entered my 30s, but this one has really helped me recover. It's not good to avoid something just because it didn't suit me before, but in my case, I'm raising a child, so I apply it right before I go to bed. I suppose I should really use lotion, serum, and cream. It's winter now, so I sleep with the air conditioner on, which really makes my skin dry. Maybe applying it right before bed is the right thing to do, because I don't feel my skin as dry in the mornings as before. The instructions say to shake well and use two pumps, but I use three. It's not enough, ugh! I'll definitely be buying it again this winter