ProtoClinical k-beauty COSRX The Hyaluronic Acid 3 Serum 20ml single centered serum bottle on a white background with dark gray packaging
ProtoClinical k-beauty COSRX The Hyaluronic Acid 3 Serum 20ml single centered serum bottle on a white background with dark gray packaging
COSRX

COSRX The Hyaluronic Acid 3 Serum 20ml

$17.03
Adds reflective eye sparkle
High strength formula infused with 3% hyaluronic acidHighly concentrated 3% hyaluronic acid serum that hydrates, plumps, soothes and supports the skin's moisture barrier.
For all skin types dealing with uneven texture: COSRX's serum with Hyaluronic Acid works from within to deliver delivers deep, lasting hydration that keeps skin plump throughout the day, not just temporary comfort.
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Korean Beauty Formulation Suitable for Daily Use
Hyaluronic Acid 3%
COSRX The Hyaluronic Acid 3 Serum 20ml
COSRX The Hyaluronic Acid 3 Serum 20ml Default Title
$17.03
Clinically proven actives Dermatologist tested 100% authentic Korean Cruelty-free
What's inside ·

Hyaluronic Acid 3%, the repair molecule

Hyaluronic acid is a glycosaminoglycan naturally present in the dermis. When applied topically, low-molecular-weight HA penetrates beyond the surface to bind water molecules between skin cells, creating a reservoir effect that keeps skin plump from within. In this serum, Hyaluronic Acid targets uneven texture, delivering delivers deep, lasting hydration that keeps skin plump throughout the day with consistent use.
Hyaluronic Acid 3%
draws and locks moisture deep within the skin, holding up to 1000x its weight in water
The texture

Lightweight, absorbing serum

High strength formula infused with 3% hyaluronic acid


Highly concentrated 3% hyaluronic acid serum that hydrates, plumps, soothes and supports the skin's moisture barrier.

All Skin Types dryness dehydration barrier weakness
Hover the swatch — it ripples like water

How to use

1

Step 1: After cleansing and toning, press 2 to 3 drops onto fingertips.

2

Step 2: Gently pat and press across forehead, cheeks, nose, and chin.

3

Step 3: Allow 30 seconds for full absorption before the next step.

4

Step 4: Follow with moisturizer. Use sunscreen in the morning.

Full transparency

Ingredients

Hyaluronic Acid draws and locks moisture deep within the skin, holding up to 1000x its weight in water. This focused formula puts all its power behind one proven active for maximum impact.

COSRX The Hyaluronic Acid 3 Serum 20ml is built around a high-strength hydration serum focused on plumping and barrier support. Its ingredient story centers on 3% hyaluronic acid and water-binding support ingredients. In cosmetic formulas, these materials are used because they can draw water into the skin, improve bounce, and reduce the dry tight feeling that weakens overall skin comfort. That matters for this product format because a serum format works well because concentrated hyaluronic care layers neatly under moisturizer without adding heaviness. Rather than promising instant transformation, the formula is designed to improve skin gradually through hydration support, barrier comfort, and steady visible refinement. With consistent use, that kind of approach can help skin look calmer, brighter, smoother, firmer, or more balanced depending on the product goal, while keeping the routine wearable. Texture also shapes performance: essences and serums layer easily, while creams create a more protective finish and targeted spot formulas stay focused where they are needed. In short, the science behind this product is ingredient synergy matched with a texture that helps those ingredients work in a practical daily routine.

The detail

Specs & details

FormatLightweight serum
SizeDefault Title
Skin typesAll Skin Types
Country of originSouth Korea
Pairs beautifully with

Complete the routine

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$17.03
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Questions & answers

After cleansing and toning, before moisturizer. Serums deliver actives most effectively on freshly prepped skin.
Yes. Apply from thinnest to thickest consistency and allow each layer to absorb before the next.
Most users notice initial improvement within 2 to 4 weeks. For full benefits like delivers deep, lasting hydration that keeps skin plump throughout the day, allow 6 to 8 weeks of consistent use.
Your skin begins adjusting. You may notice improved hydration and comfort before more visible changes like texture refinement become apparent.
Yes, this formula is developed to be compatible with all skin types dealing with uneven texture. If you have very reactive skin, patch test on the inner arm before full application.
The formula is designed to be well-tolerated. For pregnancy-specific concerns, consult your healthcare provider. For sensitive skin, patch test before full application.
Hyaluronic Acid draws and locks moisture deep within the skin, holding up to 1000x its weight in water. Consistent daily use is key to seeing the full benefits.
Check the INCI list for the most accurate information on fragrance components. The formula is developed for minimal irritation potential.
Store in a cool, dry place away from direct sunlight. Use within 12 months of opening for optimal freshness and efficacy.
Serums have a higher concentration of targeted actives than essences and a lighter consistency than most ampoules. They deliver the most potent treatment in your routine.
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About the brand

OriginSeoul, KR
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