Hyaluronic acid — the ingredient Korean labels list five different ways
Hyaluronic acid is a water-binding molecule your skin already makes.
Last reviewed 28 August 2026.
Hyaluronic acid is a water-binding molecule your skin already makes. It appears in 3,645 of the 7,878 Korean products in our catalog — 46.3%, the single most common active-adjacent ingredient in K-beauty — and Korean formulas rarely use just one form: labels typically stack several molecular weights, from surface-film formers to smaller fragments.
What it is
A humectant: a molecule that binds many times its weight in water. Skin produces it naturally; cosmetic versions are fermentation-derived. On INCI lists it almost never appears as plain “hyaluronic acid” — you’ll meet a family: sodium hyaluronate (the common salt), hydrolyzed hyaluronic acid (chopped smaller), sodium acetylated hyaluronate (modified to sit better on skin), and crosspolymer forms (networked for a lasting surface film).
What it’s used for
Hydration, full stop. Formulators use the different weights for different jobs: larger forms hold water at the surface for immediate smoothing, smaller fragments carry moisture into the upper layers. It layers under almost anything, which is why it’s the default first serum in Korean routines.
In the Korean market
46.3% of cataloged products contain at least one form. It concentrates in essences/serums/ampoules (630 products), creams (490), and sheet masks (424). Its most frequent partners are niacinamide (1,750 shared products), ceramide NP (1,195), and centella extract (1,013) — the classic hydrate-brighten-calm trio. The brands most committed to it: Round Lab (84 products), Torriden (71), Mediheal (54). Torriden’s DIVE-IN line is the best-known “multi-molecular” HA marketing in Korea — and its label backs the claim with five distinct HA entries.
Who tends to like it / who should be careful
Nearly every skin type tolerates it; it’s among the least reactive ingredients in the catalog. The one practical note: in very dry air, heavy humectant layers can feel tight without a cream on top — Korean routines almost always seal it with an occlusive step.
On the label
Korean packaging lists it as 소듐하이알루로네이트, 하이알루로닉애씨드, or 하이드롤라이즈드하이알루로닉애씨드. Counting how many 하이알루… entries a label carries is the quickest way to spot a hydration-focused formula in the aisle.