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

Hydrates whilst supporting and strengthening the skin’s barrier

4.5
Rated 4.5 out of 5 stars
4.5 Stars (320 Reviews)
$30.00 / 2 full-size products
from $21.00 / 2 full-size products

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WHAT YOU GET: An all-year round deep hydration essential. This dual-action ectoin serum deeply hydrates + strengthens the skin barrier to combat environmental stressors like heat, aircon, pollution and sun.

WHY IT WORKS: 2% Ectoin acts as a natural hydrator and barrier stabiliser, helping to calm irritation and prevent moisture loss. Multi-Molecular Hyaluronic Acid restores skin’s moisture barrier from the outside in - even in harsh conditions.

HOW IT FEELS: Lightweight, silky and non-tacky. Melts into skin for instant hydration and all-day comfort.

WHEN TO USE: Use AM and PM after cleansing and before moisturiser. Perfect serum for dry skin & for layering into your everyday skincare and makeup routine.


This Duo contains x2 Ectoin Hydro-Barrier Serum (30ml)

Suitable for:

  • All skin types
  • Sensitive Skin
  • Pregnancy & Breastfeeding

Targets:

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

Awards & Features

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
  • Before and after comparison
    "Magic Potion! My menopausal skin crisis happened just as this product was launched. My skin was suddenly reacting to products I had used for months/years. It was red, dry, flaky and thick. I took a chance and bought the Ectoin Hydro-Barrier Serum to see if it would help. It did an amazing job of calming my skin."

    Bridget

4.5
Rated 4.5 out of 5 stars
Based on 320 reviews
Total 5 star reviews: 233 Total 4 star reviews: 52 Total 3 star reviews: 13 Total 2 star reviews: 10 Total 1 star reviews: 12
Reviews Summary
Customers say this serum provides deep hydration and leaves skin feeling soft and plump. Many reviews mention improved skin texture and reduced dryness with regular use. The lightweight formula absorbs quickly, though some note it can pill under makeup. While most find it soothing for sensitive skin, a few report it didn't meet their hydration needs. Reviews frequently highlight its effectiveness for dry and reactive skin types. Common feedback includes appreciation for its smooth application and lasting moisture, though several wish for a larger bottle size.
320 reviews
  • Alice C.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 25 - 34
    Skin Type Normal
    Skin Concerns Hyperpigmentation, Dryness
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    3 days ago
    Amo questo prodotto

    Lo adoro, penso che lo ricomprerò all'infinito. È idratante, illuminante.. sinceramente ho visto ottimi miglioramenti

  • Tayler F.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 35 - 44
    Skin Type Combination
    Skin Concerns Hyperpigmentation, Breakouts, Blackheads, Plumping
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    6 days ago
    Love this!

    I really love how light this is

  • Maddie
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I do not recommend this product
    Age Range 25 - 34
    Skin Type Combination
    Skin Concerns Dryness, Plumping
    Sensitive Skin Friendly? Yes
    Rated 1 out of 5 stars
    1 week ago
    Poor product for me

    Was very hopeful as this has high reviews but this product just doesn’t work for me. Firstly as some have said the pump mechanism is not great and that is an issue but it does pump out for me just very small amounts at a time. As far as how it performs I believe my problem is this doesn’t mesh well with my other skincare which causes it to make everything on my face pull up which leave my entire routine useless if my skin isn’t absorbing the skincare. If this product was life changing I’d be willing to make it work and change my other products to see if that would prevent the pilling issue but it really just isn’t that good to do all of that. Wanted to return but it was too late.

    IU Profile picture for INKEY USA
    INKEY USA
    2 days ago

    Thank you so much for taking the time to share your detailed feedback, Maddie.

    We're truly sorry to hear about your experience with our Ectoin Hydro-Barrier Serum. This is absolutely not the experience we want any of our customers to have. While many customers use our serum without issue, we understand that everyone's skin can react differently to serum formulations, and compatibility with existing skincare routines can vary greatly from person to person. The pump mechanism concerns and pilling issues you've described when layering with other products are particularly valuable feedback for us. We recognise how frustrating it must be when a product doesn't integrate well with your established routine, especially after having high hopes based on other reviews. We take your experience very seriously, and we'd love for you to reach out to our askINKEY Team, as we would greatly appreciate the opportunity to understand your experience further and explore how we can support 🖤