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    COSRX

    COSRX The Hyaluronic Acid 3 Serum

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    Three weights of hyaluronic acid in one serum — delivers deep, layered hydration for visibly plumper skin.

    Our Asian beauty edit
    €24.0020ml · €120.00/100 ml · incl. VAT
    1

    In stock · In stock · dispatched in 1–2 working days

    In your routine

    CleanseToneTreatMoisturiseProtect
    Step
    5 · Treat
    How often
    Daily
    Starting out
    Daily from day one.

    • Hyaluronic Acid (Three Molecular Weights)Low, medium, and high molecular weight hyaluronic acid work at different depths of the skin to provide comprehensive hydration — from surface-level softness to deep dermal plumping.
    • Sodium HyaluronatePenetrates deeply to lock in moisture and visibly improve skin plumpness and elasticity.

    After cleansing and toning, apply a few drops to the face and neck. Gently pat with fingertips until absorbed. Follow immediately with moisturiser to seal in hydration. Use morning and evening.

    Water, Butylene Glycol, Propanediol, Glycerin, Sodium Hyaluronate(3%), Pentylene Glycol, 1,2-Hexanediol, Diethoxyethyl Succinate, Sodium Polyacryloyldimethyl Taurate, Betaine, Xanthan Gum, Dimethicone, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Sodium PCA, Sodium Lactate, PCA, Glyceryl Acrylate/Acrylic Acid Copolymer, Hydrogenated Lecithin, Ethylhexylglycerin, Serine, Alanine, Glycine, Sodium Phytate, Sorbitan Isostearate, PVM/MA Copolymer, Glutamic Acid, Citric Acid, Lysine HCl, Threonine, Arginine, Sodium Methyl Stearoyl Taurate, Proline, Ceramide NP, Cholesterol, Caprylic/Capric Triglyceride, Phytosphingosine, Stearic Acid, Oleic Acid, Alcohol, Tocopherol, Lactic Acid, Caprylyl Glycol, Caprylhydroxamic Acid

    A high-concentration hyaluronic acid serum that delivers triple-layered hydration to skin at every level. Three forms of hyaluronic acid — each a different molecular weight — work together to hydrate the surface, the mid-layers, and the deeper dermal layers of the skin simultaneously. The result is visibly plumper, bouncier, and more supple skin with consistent use.

    Key Benefits:

    • Triple-weight hyaluronic acid hydrates at every layer of skin
    • Visibly plumps fine lines and improves skin bounce
    • Lightweight formula absorbs quickly and layers easily
    • Suitable for all skin types including sensitive and dehydrated
    • Fragrance-free and non-comedogenic

    After cleansing and toning, apply to the face and neck. Gently pat until absorbed. Follow with moisturiser to seal in hydration.

    Suitable for

    • sensitive
    • rosacea-prone
    • post-procedure
    • mature
    • Fragrance-free

    Highlights

    Calms redness
    Hydration
    Hyaluronic Acid
    Fragrance-free

    Questions

    It combines three molecular weights of hyaluronic acid, so it hydrates at different depths of the skin rather than just sitting on the surface. The result is visibly plumper, bouncier skin — at €24 it's one of the best-value hydrating serums we stock.

    Apply a few drops to slightly damp skin after cleansing and toning, then seal immediately with moisturiser — hyaluronic acid draws water, so it needs moisture to pull from and a cream to lock it in. Use morning and evening.

    Yes — hyaluronic acid is the universal team player. It buffers stronger actives, reduces irritation, and layers safely with everything, making it ideal alongside retinoids or exfoliating acids. It's fragrance-free and suits all skin types, including sensitive.

    Yes. Oily skin is often dehydrated skin overproducing oil to compensate. A lightweight water-based HA serum hydrates without any richness, which over time can help rebalance how oily your skin feels through the day.

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