It's still early days in my use of the serum, but when I put it on my skin I can feel a slight tightening. It sinks in quickly and isn't sticky. I use it with the Age Defy Nourishing Moisturiser on top, which is gel like and not at all greasy, and is great under make-up, as I find some creams far too greasy for my mature but combination skin. I am pleased with both of these products so far.