COSRX Pure Sodium Hyaluronic Acid Serum 3% — 20ml Fragrance-Free Hydrating, Ceramide Barrier Support

COSRX Pure Sodium Hyaluronic Acid 3% Serum is a concentrated lightweight hydrator that delivers long-lasting moisture and skin-plumping benefits without fragrance.

This compact 20 ml serum combines 3% pure sodium hyaluronic acid with ceramides and natural moisturizing factors to reinforce the skin’s barrier and hold water where it’s needed most. The formula is designed to absorb quickly, layer well under creams or makeup, and suit sensitive complexions thanks to cosmetic-grade, non-irritating ingredients. Its minimal ingredient list focuses on hydration and barrier support rather than additives or scent.

How quickly will I notice extra hydration?

Many users feel immediate smoothness and reduced tightness after the first application as hyaluronic acid attracts and binds moisture. Fuller-looking skin commonly appears within days with consistent use, while barrier improvement from ceramides and NMF builds over weeks.

• 3% pure sodium hyaluronic acid for instant moisture attraction.
• Ceramides strengthen the skin’s protective layer over time.
• Easy absorption—good for layering under creams and SPF.
• Visible softness usually after the first few uses.

Can I use this serum with my existing skincare routine?

This serum is made for compatibility: apply a few drops to clean skin, then follow with moisturizer and sunscreen in the daytime. It layers well beneath heavier creams, oils, or makeup and pairs safely with most actives when not combined with drying alcohols or harsh exfoliants at the same time.

• Apply 2–3 drops to face and neck morning and/or night.
• Works under moisturizers, sunscreens, and makeup.
• Safe with most serums—avoid mixing with strong solvents or irritating blends.
• Patch test recommended before facial use if you have very reactive skin.

Is this product suitable for sensitive or aging skin?

The formulation avoids artificial fragrance and common irritants, making it a reasonable choice for sensitive types seeking hydration and plumping. The humectant action of sodium hyaluronate visibly reduces the appearance of fine lines by filling and hydrating the surface, while ceramides support resilience in aging or compromised skin barriers.

• Fragrance-free and dermatologically tested to reduce potential irritation.
• Hyaluronic acid helps diminish the look of fine lines when skin is well hydrated.
• Ceramides and NMF support barrier repair and moisture retention.
• Non-comedogenic formulation suitable for many skin types.

How should I store and apply the serum for best results?

Keep the bottle tightly closed in a cool, dry place away from direct sunlight. Apply to slightly damp skin to maximize hyaluronic acid’s water-binding ability, then lock in hydration with a cream or oil to prevent evaporation.

• Store upright in a cool, shaded area.
• Apply to damp skin for improved absorption and plumping.
• Follow with moisturizer to seal moisture in.
• Use consistently twice daily for best long-term effects.

Who is this for? COSRX Pure Sodium Hyaluronic Acid 3% Serum is aimed at anyone looking to boost skin moisture quickly—people with dry, dehydrated, or combination skin; those beginning anti-aging care who want to minimize fine lines; and users who prefer simple, fragrance-free Korean skincare that layers well into established routines. It is also a practical choice for sensitive skin types seeking barrier-supporting ingredients without unnecessary additives.