Peptides in K-beauty: what those long names on firming serums mean
Peptides are all over Korean firming serums, eye creams and "lifting" ampoules. The ingredient names can look intimidating, so here's a plain-language overview.
What peptides are Short chains of amino acids, the building blocks of proteins. In skincare they're designed to act as small messengers or carriers.
Groups you'll hear about
- Signal peptides, such as palmitoyl tripeptide or palmitoyl pentapeptide, marketed to support the look of firmness
- Carrier peptides, like copper tripeptide-1 (copper peptide), which delivers copper to the skin
- "Botox-like" peptides, such as acetyl hexapeptide (often sold as argireline), marketed for expression lines; the effect is far milder than an injection
Honest expectations
- Research exists for several peptides, but results vary and many studies are small or brand-funded
- They're usually gentle, which makes them popular with sensitive skin
- They work best as one part of a routine that already includes sunscreen
Pairing tips people share
- Peptides layer easily with hydrators and niacinamide
- Some prefer to keep copper peptides away from strong acids in the same step
Do you use a peptide product? What made you pick it?
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