COSRX Sodium Hyaluronic Acid 3% Serum — 20ml Hydrating Facial Serum, Ceramides for Plumping Fine Lines

COSRX Pure Sodium Hyaluronic Acid 3% Serum delivers targeted, long-lasting hydration to visibly plump and smooth dry, fine-lined skin.

This lightweight Korean serum combines a concentrated 3% sodium hyaluronic acid with ceramides and natural moisturizing factors to pull and lock moisture into multiple skin layers. Formulated without artificial fragrance, parabens, sulfates, or phthalates, the 20 ml dropper bottle is made for daily layering under creams or makeup. Dermatologist-tested and cruelty-free, it supports skin barrier resilience while improving immediate surface moisture and the look of fine lines.

How does this serum hydrate skin differently from regular moisturizers?

The formula uses a high concentration of sodium hyaluronic acid which attracts and binds water at varying depths of the skin. Paired with ceramides and natural moisturizing factors, it not only draws hydration in but helps seal it, reducing transepidermal water loss.

• 3% sodium hyaluronic acid provides multi-depth hydration.
• Ceramides strengthen the lipid barrier to retain moisture longer.
• Natural moisturizing factors mimic skin’s own hydration system.
• Thin serum texture layers easily under creams or sunscreen.

When and how should I apply the COSRX Hyaluronic 3% Serum?

Use it morning and/or evening after cleansing and toning, while skin is slightly damp to maximize absorption. Apply 2–3 drops to face and neck, gently patting until absorbed; it can be used under the eye area but avoid direct contact with the eye.

• Apply on slightly damp skin for best results.
• Use 2–3 drops; pat in instead of rubbing.
• Layer under moisturizer or sunscreen for daytime protection.
• Perform a patch test before first facial use to check sensitivity.

Will this serum help reduce the appearance of fine lines and dryness?

By replenishing water content and reinforcing the skin barrier, the serum visibly plumps dehydrated skin, which softens the look of fine lines. Improvements depend on skin type and routine consistency, but many users notice smoother, more hydrated skin after regular use.

• Instant plumping effect from water-attracting hyaluronic acid.
• Barrier support from ceramides reduces future moisture loss.
• Consistent application enhances texture and comfort over time.
• Suitable as an everyday hydration boost for stressed skin.

Is the product safe for sensitive skin and free from harsh additives?

COSRX formulates with gentle, skin-friendly ingredients and omits common irritants. The serum is dermatologist-tested, hypoallergenic, and free of parabens, sulfates, phthalates, artificial fragrance, and animal testing, making it a considerate choice for many sensitive skin types.

• Hypoallergenic and dermatologist-tested to minimize irritation risk.
• No artificial fragrance, parabens, sulfates, or phthalates.
• Cruelty-free formulation aligned with COSRX standards.
• Patch testing recommended for very reactive skin.

Who is this for? The COSRX Pure Sodium Hyaluronic Acid 3% Serum suits anyone wanting a concentrated hydration boost — particularly those with dry, dehydrated, or combination skin that shows fine lines from moisture loss. It's ideal for layered skincare routines, morning and night use, and for people seeking a fragrance-free, dermatologist-tested option to reinforce the skin barrier without heavy textures.