Dry skin that just never gets enough moisture?
You moisturise and moisturise – and still your skin feels tight, looks dull or shows dryness lines. Often what’s missing is care that keeps moisture in the skin.
A light serum under your cream makes exactly that difference.
The Hydrating Serum: noticeably plump, hydrated skin
Light, fast-absorbing and in an airless dispenser – here’s how to use it:
- After cleanser & toner – morning and evening.
- 1 pump – apply to face, neck and décolleté.
- Then cream or SPF – the serum prepares your skin for care.
With a fermented marine active and hyaluronic acid – ideal for dry, dehydrated or sensitive skin.
Try it – completely risk-free
With our 30-day satisfaction guarantee on your first order you can test The Hydrating Serum at home – even opened and used. Not convinced? You get your money back, and returns are free.
Free shipping from €28 · Delivered in 1–3 working days (DE)
Key ingredients
Marine biotech and moisture.
Why The Hydrating Serum?
Moisture plus barrier care.
| The Hydrating Serum | Many conventional serums | |
|---|---|---|
| Biotech active Alteromonas ferment | ✓ | rarely |
| Hyaluronic acid in several molecular sizes | ✓ | partly |
| Airless dispenser protects the formula | ✓ | not always |
| Certified natural skincare (COSMOS) | ✓ | ✕ |
| Vegan & cruelty-free | ✓ | not always |
| Developed by a beautician | ✓ | ✕ |
| 30-day money-back guarantee | ✓ | ✕ |
General comparison with typical products in this category, not with a specific brand.
Fact sheet
Everything you need to know at a glance.
As seen in
Our Customers' Skincare Journeys
Real results, real stories
My dry patches are almost gone after two weeks.
Clara F.
The serum is light, absorbs quickly, and my skin glows all day.
Nina H.
I've tried many serums – this one is by far the best.
Katharina L.
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How do I use the products?
Frequently Asked Questions
No – unlike classic hyaluronic serums, this serum also contains Alteromonas ferment extract. This marine active supports the skin barrier and helps store moisture in the skin in the long term, instead of just plumping it up briefly.
Yes – the combination of hyaluronic acid and Alteromonas ferment intensely moisturises your skin while having a calming effect. Your skin doesn’t just feel hydrated, but also more balanced and resilient.
The serum has a light, fast-absorbing texture that leaves no sticky film. Your skin feels fresh, smooth and pleasantly cared for straight away – ideal under make-up too.
Yes – many notice a more hydrated, plumper complexion after just a few uses. With regular use, skin looks smoother, calmer and visibly fresher in the long term.
Not sure if this is right for you?
As a beautician I often see: dry skin doesn’t need more cream, it needs more moisture. The serum is for you if your skin feels tight, looks dull or tends to dryness lines.
Complete with cleanser and day cream in the Hydra Barrier Repair Set. Still unsure? Our skin analysis finds your routine in 60 seconds.
– Nia, founder of COSMENIA
Our guarantee
We stand behind every formula. That’s why your first order comes with a 30-day satisfaction guarantee – even opened and used, including sets. Contact us at info@cosmenia.de and we’ll refund the purchase price; return shipping is on us. Your statutory right of withdrawal remains unaffected.
We are COSMENIA
Since 2013 we have been developing certified natural skincare in Munich – Ecocert COSMOS, vegan and cruelty-free. Nia brings over 25 years of experience as a beautician, Julian the male perspective: reduced, functional and effective.
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