COSRX The Hyaluronic Acid 3 Serum is a highly concentrated, specialized treatment designed to deeply hydrate, plump, and strengthen the skin barrier. Formulated as part of the brand's intensive "The RX" line, it targets severe dryness, dehydration, fine lines, and rough or flaky skin textures
Why This Formula Stands Out
According to product documentation, the serum utilizes a high-potency blend of skin-restoring agents:
3% Low-Molecular Hyaluronic Acid: Uses a high-strength concentration of small sodium hyaluronate particles. Because the molecular size is minimized, it penetrates into the deeper layers of the skin rather than sitting on the surface, maximizing internal moisture retention.
Natural Moisturizing Factors (NMF) Amino Acid Complex: Contains a specialized blend (including serine, glycine, and alanine) that mimics the skin's natural moisture system to improve the foundational skin barrier.
Ceramide NP: This essential lipid fills in structural gaps in the skin barrier, actively locking in the serum's hydration and protecting against external environmental stressors
How to Use It Effectively
To get the most out of the formulation based on standard routines:
Cleanse: Wash your face thoroughly and pat dry.
Apply: Dispense 3 to 5 drops during your serum step. Massage gently from the center of your face outward.
Seal: Allow it to absorb for 30 to 60 seconds, then follow immediately with a moisturizer to trap the hydration inside the skin layers. It can be safely used both morning and night
