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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 (270 Reviews)
$30.00 / 2 full-size products
from $21.00 / 2 full-size products

Insider exclusive: Sign up to get a FREE Hyaluronic Acid Serum with all orders!

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*)

Express tracked shipping

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

*Find out more about shipping here.

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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 270 reviews
Total 5 star reviews: 193 Total 4 star reviews: 46 Total 3 star reviews: 11 Total 2 star reviews: 9 Total 1 star reviews: 11
Reviews Summary
Customers say this serum has a silky, lightweight texture that absorbs quickly into the skin. Many reviews mention increased hydration and plumpness, while some note improved skin texture. While most find it gentle and soothing, a few experienced dryness or breakouts. Common feedback includes its easy application and compatibility with other products, though some mention it can pill under makeup. Reviews are mixed on its effectiveness compared to similar products, with some finding it transformative while others see minimal results. The texture receives praise for being non-sticky, though some find it feels tight when drying.
270 reviews
  • Nat C.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 55 - 64
    Skin Type Dry
    Skin Concerns Dehydration
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    3 minutes ago
    True hydro-barrier

    As soon as applied, my dehydrated/dry skin feels very comfortable, more hydrated and bouncy thanks to the hydro-barrier serum.

  • Jasmine C.
    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, Dehydration
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    6 days ago
    Serums

    Feels gentle on the skin, doesn’t flare up my eczema.

  • Maria Eva Maccione S.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 35 - 44
    Skin Type Dry
    Skin Concerns Texture, Hyperpigmentation, Fine Lines and Wrinkles, Under Eye Circles, Dryness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    6 days ago
    Absolutely wonderful!!!!

    I have been using it for a 2 months now and my skin feels and looks more glowy and hydrated. I combine it with the peptides cream.