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Ectoin Hydro-Barrier Serum Duo hero
Side-by-side close-ups of a person's face labeled 'Before' and '15 Minutes Later.' The left shows matte skin with 25% hydration. The right shows visibly hydrated, glowing skin with 83% hydration
How to layer: How to layer in your routine: Clean, Hydrate, Treat, Moisturize, SPF
Product image of Ectoin Hydro-Barrier Serum with water splashes. Text states it’s clinically proven to restore skin bounce in 3 days* *4 week clinical study of 26 people
When and how to apply: AM, PM Pea-sized amount
 Diagram highlighting key skincare ingredients: 2% Ectoin for hydration, 2.5% Hyaluronic Acid for deep moisture, and 1% Barrier Blend with Ceramides for protection
 Product image of Ectoin Hydro-Barrier: Clinically proven to hydrate & strengthen skin barrier in 15 minutes*  *Clinical study of 31 people
Model with ectoin serum on skin

Ectoin Hydro-Barrier Serum Duo | The INKEY List

Double up on your hydration and skin barrier strengthening

4.5
Rated 4.5 out of 5 stars
4.5 Stars (299 Reviews)
$28.50 $30.00 / 2 full-size products
Unlock double hydration and barrier repair with The INKEY List Ectoin Hydro-Barrier Serum Duo - a dual-action powerhouse that deeply hydrates while strengthening your skin’s natural defenses. Clinically proven to restore skin bounce in just 3 days* and hydrate and strengthen the skin’s barrier in 15 minutes*, this ectoin serum duo works to optimize your skin’s health from the inside out.

Hydration and barrier support go hand in hand.

Ectoin Serum (2% Ectoin) – A natural skin protector that hydrates, fights signs of aging and inflammation, and strengthens the skin barrier.

Multi-Molecular Hyaluronic Acid Serum – Works to rebuild and restore the skin’s protective barrier while deeply hydrating up to 10 surface layers deep.

Whether you’re searching for a hydrating serum for dry skin or an everyday solution for balanced, healthier skin, this duo helps to visibly improve five key signs of a compromised barrier: dullness, dryness, redness, flakiness, and slackness. With lightweight, fast-absorbing textures, these serums deliver instant, non-tacky hydration that layers seamlessly under skincare and makeup.

Suitable for:

  • All skin types
  • Barrier support and protection ​

Targets:

  • Dehydrated skin
  • Compromised skin barrier
  • Dryness
  • Flakiness
  • Dullness

Proud to be:

  • Vegan
  • Cruelty Free
  • Carbon Net-Zero
  • Clinically Tested
  • B-Corp
  • Fragrance Free
  • Silicon Free
  • Alcohol Free
  • Pregnancy & Breastfeeding Safe
  • Dermatologically Tested

Awards & Features

Refinery29
Vogue
Grazia

Shipping info

Standard tracked shipping

  • $5.95 or FREE on your first order & orders over $35
  • (2-5 business days*)

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  • $15
  • (2-3 business days*, when ordered before 3pm EST)

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  • Before and after comparison
    "I was actually shocked with the results myself it kept improving and I started seeing the difference after a week and it just kept getting better I can’t wait for the official launch I’m gonna buy more products from inkey I’m really impressed with the result, this product is a part of my daily morning and night skincare routine and I’m so thankful for the opportunity you guys gave me to test this out"

    Sumbal

  • Before and after comparison
4.5
Rated 4.5 out of 5 stars
Based on 299 reviews
Total 5 star reviews: 216 Total 4 star reviews: 50 Total 3 star reviews: 13 Total 2 star reviews: 9 Total 1 star reviews: 11
Reviews Summary
Customers say this serum provides excellent hydration and absorbs quickly into the skin. Many reviews mention improved skin texture and plumpness after regular use. While most find it gentle and effective, some note it can pill under makeup. The lightweight formula receives praise for its smooth application, though a few users report it wasn't hydrating enough for their needs. Reviews frequently highlight its suitability for sensitive skin, with many noting improved skin comfort. Some users mention seeing visible results within weeks of use, particularly in skin smoothness and overall appearance.
299 reviews
  • Cathy
    Verified Reviewer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 55 - 64
    Skin Type Dry
    Skin Concerns Dehydration, Dryness, Fine Lines and Wrinkles, Damaged Skin Barrier, Under Eye Circles
    Sensitive Skin Friendly? No
    Rated 5 out of 5 stars
    23 hours ago
    Ectoin Hydo-Barrier Serum

    I love this as prevents my skin feeling tight for the whole day and you genuinely don’t need much.

  • Jenna S.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Redness, Texture, Fine Lines and Wrinkles, Dryness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    4 days ago
    Repairs skin from inside out

    I have very sensitive skin and often react to things and when I slowly can reintroduce skin care against then this is the first thing I start to use. It really helps speed up the process and get my skin back to a happy, healthier and smoother state. Love it!

  • Florence H.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 25 - 34
    Skin Type Dry
    Skin Concerns Dryness, Fine Lines and Wrinkles, Blackheads
    Sensitive Skin Friendly? Yes
    Rated 4 out of 5 stars
    4 days ago
    Good but I still want the Q10 back!

    Was really eager to try this and yes it helps for hydration/moisture but would really love it if the Q10 cream was brought back please !