I've been using PC products for about 5 years and my skin at 46 thanks me! I absolutely love this serum from the Resist line and use it in both my morning and evening routines. I always mix it with a little PC Vit C boost and together both go on beautifully and smooth. In the morning before I put on my foundation, it dries nicely and leaves no sticky residue. I can't live without this stuff (I used to use Olay Regenerist serum instead which is fab too but they test on animals). Thank you PC for another wonderful product!