Hydrolyzed hyaluronic acid is a low-molecular-weight, enzymatically fragmented form of hyaluronic acid used at trace concentrations (50 ppm) to attract and bind water in the skin. Its smaller size allows somewhat better penetration into the upper layers compared with high-molecular-weight hyaluronic acid, supporting surface hydration and a smoother skin feel.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient irritation or redness | Rare | Generally well tolerated; occasional irritation may relate to other formulation components rather than the ingredient itself. |
| Contact allergy / hypersensitivity | Very rare | Isolated case reports; true allergic reaction to hyaluronic acid derivatives is uncommon. |
| Stinging on compromised or broken skin | Rare | More likely on damaged barrier; usually mild and short-lived. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.