How Acetyl Tetrapeptide-5 works 아세틸테트라펩타이드-5
Acetyl tetrapeptide-5 is proposed to affect the cross-linking of proteins and the movement of fluid in the delicate tissue under the eye, which would in theory reduce the look of morning puffiness. The supporting evidence is largely from the supplier, on small numbers of people, and independent replication is hard to find. It is well tolerated, which is why it persists in eye formulas despite thin data. Products almost always pair it with caffeine, which has its own short-lived vasoconstricting effect, so crediting any morning improvement to the peptide alone is guesswork.
| Acts on | the look of under-eye puffiness |
|---|---|
| Evidence | Limited |
Acetyl Tetrapeptide-5 guide →Effective % & pH →
Related K-beauty guides
Try the free tools
🙋 People also ask
How long does Korean skincare take to work?
Most skincare, Korean or otherwise, needs time. Hydration benefits can appear quickly, but visible changes in tone, texture or fine lines typically take several weeks to a few months of consistent use, roughly one skin cycle or more. Sun protection and patience matter more than any single product.
Does Korean skincare work for deeper skin tones?
The skincare does — hydration, barrier support and soothing actives are not tone-specific. The friction points are mineral sunscreens that leave a cast and a colour-cosmetics shade range that has historically been narrow.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.