1. , which means serious business when it comes to pores, wrinkles, and fine lines — especially because a little bit of this K-beauty staple goes a looooong way. Reviewers are obsessed with how quickly they see results out of this, particularly how it plumps, firms, and evens out their skin. Note that you definitely have to apply sunscreen while you're using this, and should build gradually — two times a week at first, and then four! 

Celimax's Retinal Shot