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Model B&A for ectoin
How to layer your routine:  with a five-step sequence: 1. Clean, 2. Hydrate, 3. Treat, 4. Moisturize, 5. SPF
Clinically proven to restore skin bounce in 3 days* *4 week clinical study of 26 people
Apply pea-sized amount
When to apply: AM & PM
Key ingredient science
Day 1 vs Day 28, showing reduced redness
Day 1 vs Day 28, showing reduced redness
Clinically Proven to Hydrate + Strengthen the barrier in 15 minutes *Clinical study of 31 people
Before and after 15 minutes: Instantly strengthen barrier and hydrated up to 10 surface layers deep
Model with ectoin on skin

Ectoin Hydro-Barrier Serum | The INKEY List

Hydrates whilst supporting and strengthening the skin’s barrier

4.5
Rated 4.5 out of 5 stars
4.5 Stars (295 Reviews)
$20.00 / 30ml
A breakthrough in barrier skincare, The INKEY List Ectoin Hydro-Barrier Serum is your winter skin savior—a dual-action serum that boosts hydration up to 10 surface layers deep whilst building a stronger, more resilient skin barrier to defend against cold weather, dry air, and seasonal stressors. Clinically proven to restore skin bounce in just 3 days and deeply hydrate + strengthen the skin’s barrier in just 15 minutes, it’s a cold-weather essential for keeping skin hydrated, soothed, and glowing all season long.

Replenishing your hydration whilst simultaneously repairing your barrier is essential for protecting against winter dryness and moisture loss. Our Ectoin Hydro-Barrier Serum has been uniquely formulated with ingredients that work synergistically to provide deep, multi-level hydration, helping to lock in moisture and shield the skin from environmental aggressors.

2% Ectoin: Known as an extreme protector, Ectoin acts as a natural hydrator and skin cell stabilizer, helping to prevent winter-induced dehydration, calm irritation, and reinforce barrier strength for skin that stays soft, smooth, and comfortable.

Multi-Molecular Hyaluronic Acid: Helps restore the protective skin barrier from the outside in, enabling it to retain moisture more effectively—even in cold, dry air.

Whether you're looking for a hydrating serum for winter-parched skin or a lightweight layer of moisture to keep skin balanced, with continued daily use, this serum visibly improves 5 signs of a compromised skin barrier: dullness, dryness, redness, flakiness, and slackness. The INKEY List’s Ectoin Serum has a lightweight texture that melts into the skin, delivering instant, non-tacky hydration—perfect for layering under your winter skincare and makeup routine.

Suitable for:

  • All skin types
  • Barrier support and protection ​

Targets:

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

Proud to be:

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

Awards & Features

refinery29
Vogue
Grazia

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  • $6.99
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This product

Have you tried?

This product

Ectoin Hydro-Barrier Serum

Ectoin Hydro-Barrier Serum

  • • For those who want healthier, stronger skin
  • Hydrates & strengthens the skin barrier in just 15 minutes*
  • • Gives visibly bouncier & smoother skin in just 7 days*
  • • Visibly improves 5 signs of a compromised skin barrier: dryness, flakiness, dullness, redness and slackness

or

Have you tried?

Hyaluronic Acid Serum - 30ml

Hyaluronic Acid Serum - 30ml

  • • For those who want to maintain healthy, hydrated skin
  • • Provides instant & lasting hydration
  • • Helps your other skincare work harder
  • • Leaves skin feeling plump & smooth

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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 295 reviews
Total 5 star reviews: 212 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 absorbs quickly and provides deep hydration. Many reviews mention improved skin texture and plumpness. The lightweight formula works well for sensitive skin types, though some note it can pill under makeup. While most find it effectively moisturizing, a few experienced dryness or breakouts. Common feedback includes its smooth application and non-sticky finish. Reviews highlight its compatibility with other skincare products, particularly in evening routines. Some users note visible improvements within weeks of use.
295 reviews
  • Cece
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 25 - 34
    Skin Type Dry
    Skin Concerns Redness, Dryness, Texture
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    4 days ago
    Love this Serum

    I struggle with extremely dry skin and redness. This serum reduced my redness within a week of using it! Also helps the rest of my skincare glide on and really helps with those dry eczema spots. Wish they sold it in a bigger bottle.

  • Ariell C.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 35 - 44
    Skin Type Dry
    Skin Concerns Redness, Texture, Fine Lines and Wrinkles, Dryness, Under Eye Circles
    Sensitive Skin Friendly? Yes
    Rated 4 out of 5 stars
    2 weeks ago
    The friend you never knew you needed

    Your pre-hydration, hydration. Simple step to provide great plumping. Scent is a little weird, but who cares?!

  • Chara L.
    Verified Buyer
    Reviewing
    Ectoin Hydro-Barrier Serum
    I recommend this product
    Age Range 35 - 44
    Skin Type Dry
    Skin Concerns Redness, Fine Lines and Wrinkles, Dryness, Breakouts
    Sensitive Skin Friendly? Yes
    Rated 5 out of 5 stars
    2 weeks ago
    Serum

    One of the best serum