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The Hyaluronic Acid 3 Serum

COSRX

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This item is no longer available. Browse our recommendations for something similar.

Details & care

What it is: A highly concentrated 3% hyaluronic acid serum that hydrates, plumps, soothes and supports the skin's moisture barrier.

What it does: The serum helps infuse skin with hydration, strengthening the skin barrier and giving your complexion a lasting glow. it locks-in moisture to support the moisture barrier and leave skin plumped, hydrated and soothed.

How to use: After cleansing, during the serum phase, apply a few drops of the serum onto the skin. Use fingertips to gently massage and absorb the serum, starting from the center of the face and working towards the edges. It can be used in the morning or evening.

  • 0.67 oz.
  • Item #10133851

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Reviews

(123)
4.8 out of 5
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Most helpful positive review

May 9, 2026
One of the best hyaluronic
[This review was collected as part of a promotion.] One of the best hyaluronic acids on the market. Love the way it makes my skin feel!!
Paigen J.
Reposted from cosrx

Most helpful critical review

Dec 20, 2025
This item comes in a
[This review was collected as part of a promotion.] This item comes in a dark black bottle for a reason, yet I used it no more than 8 times and it was already empty. It appears the bottle was filled less than halfway from the start. I’m extremely disappointed by the lack of honesty from this company. While the product itself is effective, the misleading packaging and underfilled bottle have pushed me to look for another Korean alternative
Lola E.
Reposted from cosrx

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Paigen J.
Reposted from cosrx
May 9, 2026
One of the best hyaluronic
[This review was collected as part of a promotion.] One of the best hyaluronic acids on the market. Love the way it makes my skin feel!!
Patricia S.
Reposted from cosrx
May 8, 2026
I use the Hyaluronic Acid
[This review was collected as part of a promotion.] I use the Hyaluronic Acid 3 daily to give me extra hydration. It leaves my skin and hydrated. It’s quick to absorb. I just wish the it was offered on a larger size. A must add to your skin routine
Tameca B.
Reposted from cosrx
Apr 21, 2026
Makes my skin look firm
[This review was collected as part of a promotion.] Makes my skin look firm and smooth I look years younger than I did before I started using this product
Cherie L.
Reposted from cosrx
Mar 21, 2026
Liquid miracle
[This review was collected as part of a promotion.] This serum goes on smooth, is quickly absorbed and extremely effective. My pores immediately appear smaller, and my face is glowing, appears nourished and youthfully plump.
Danielle M.
Reposted from cosrx
Mar 21, 2026
Product was very nice, worked
[This review was collected as part of a promotion.] Product was very nice, worked great on my skin especially around my eye area but, there was hardly anything in the bottle so I would not purchase again.
Thomas S.
Reposted from cosrx
Feb 20, 2026
Great product. I love it.
[This review was collected as part of a promotion.] Great product. I love it. Makes my face feel soft.
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