Add a few drops of this lightweight, peptide-rich toning serum after cleansing ... "First and foremost, the plumping effect is incredible," raved a fourth fan. "My skin feels noticeably firmer ...

It’s also the key component of plumping injectables, like Juvéderm, and a hero ingredient in countless skin care products. Among them: The Grace and Stella Hyaluronic Acid Serum. Though ...