If I had to choose one skincare ingredient to use for the rest of my life... it would be retinol. I used the new @kiehlscanada Kiehl’s Fast Release Wrinkle Reducing Night Serum for 8 weeks and documented the whole process. TIP: always wear sunscreen when using retinol (actually at any time lol - protect your beautiful faces!) Have you used retinol? Would love to know your experiences with it. #KiehlsCanada #KiehlsRetinol #ad