Peptides are having a moment in K-beauty, and for very good reason. These short chains of amino acids are the building blocks of proteins like collagen and elastin, which means they're brilliant at helping your skin look firmer, smoother and more supple over time. Korean and Asian skincare brands tend to layer multiple peptide types (signal, carrier and copper peptides all bring something different to the table) alongside supporting ingredients like niacinamide, PDRN, snail mucin and hyaluronic acid, giving you a plumper, bouncier, more radiant-looking finish without the heaviness. Our edit brings together the best peptide-powered ampoules, serums, creams, eye treatments and sheet masks from the K-beauty world, and we think you're going to love them.