Shop
Connect
Join Our Community
Hydration Gel + HA
$39.99 / $33.99 subscribe
COSMOS Natural
99% Natural Origin
Vegan
Hydration Gel + HA
1.01 fl oz (30ml)
The missing layer in your routine. This water-gel sits between your serum and moisturiser, delivering multi-molecular hyaluronic acid and Sodium PCA deep into skin to bind moisture, erase dehydration lines, and maintain comfortable hydration all day — without heaviness or pilling.
Dual-HA complex: surface plumping + deep-layer hydration
Sodium PCA locks moisture as a natural skin component
Aloe, white tea & sage soothe and protect
Water-like texture · no stickiness · layers under makeup
Day 1
Instant relief
Tightness gone, skin feels comfortable
Week 1–2
Plump & dewy
Dehydration lines soften visibly
Week 3+
Lasting barrier
Skin stays hydrated hours longer
Purchase Option
Free Shipping
30-Day Guarantee
ECOCERT Certified
1
After cleansing and serum
Apply after your serum (like the Peptide Renewal Serum), while skin is still slightly damp for maximum absorption.
2
Pat a pea-sized amount in
Dispense a pea-sized amount onto fingertips. Gently pat — don't rub — across face and neck. It absorbs in seconds.
3
Layer your moisturiser immediately
Follow straight away with your moisturiser or oil to lock the hydration in. Don't let the gel dry completely before layering.
4
Also works as a midday refresh
Dab onto skin over makeup on hot or dry days for an instant hydration reset — no stickiness, no white cast.
Sodium Hyaluronate
Standard molecular weight HA that sits at the skin's surface, drawing moisture from the air and keeping the outer layer plump and soft.
Hydrolyzed Hyaluronic Acid
Smaller molecular weight — penetrates deeper than standard HA to hydrate below the surface, visibly plumping dehydration lines from within.
Sodium PCA
A natural component of skin's own moisture factor (NMF). Binds water exceptionally well and supports elasticity — more effective than HA alone at holding hydration.
Aloe Barbadensis Leaf Juice
Certified organic. Instantly soothes and calms while delivering a base layer of hydration — ideal for sensitive or reactive skin.
Salvia Officinalis (Sage) Extract
Antioxidant-rich botanical that helps protect skin from environmental stress and supports a healthy, balanced complexion.
Camellia Sinensis (White Tea) Extract
One of the most antioxidant-dense botanicals available. Guards against free radical damage and pollution while supporting skin's natural resilience.
Full Ingredient List (INCI)
Aloe Barbadensis (Aloe) Leaf Juice*, Aqua/Water, Sodium PCA, Glycerin, Panthenol, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Xanthan Gum, Pentylene Glycol, Salvia Officinalis (Sage) Leaf Extract, Camellia Sinensis (White Tea) Leaf Extract, Citric Acid, Sodium Benzoate, Potassium Sorbate
* Ingredients from organic farming
* Ingredients from organic farming
99%
Natural Origin
Every ingredient is derived from natural sources. No synthetics, no fillers.
11%
Organic Content
Certified organic ingredients including aloe leaf juice base.
✓
COSMOS Natural
Certified by ECOCERT — recognised across the EU and UK as the gold standard for natural cosmetics.
Also: 100% vegan · cruelty-free · gluten free · nut free · allergen label free · free from parabens and synthetic fragrances.
The Science
Why most moisturisers fail at hydration
The Hydration Gap
Most moisturisers sit on the surface and occlude — they trap moisture but don't add it. If your skin is already dehydrated when you apply them, you're sealing in dryness. The gel's water-based formula floods skin with moisture first, so your moisturiser has something to lock in.
Dual-Molecular Weight HA
The gel contains both Sodium Hyaluronate (larger molecule, surface level) and Hydrolyzed Hyaluronic Acid (smaller molecule, penetrates deeper). Most products use only one. The combination means hydration works at two depths simultaneously — surface plumping plus deeper dermal moisture.
Sodium PCA — Your Skin's Own Molecule
Sodium PCA is a component your skin produces naturally as part of its Natural Moisturising Factor (NMF). It's one of the most effective humectants known — holding significantly more water than glycerin. As NMF depletes with age and environmental exposure, replacing it makes a measurable difference to elasticity.
Botanical Antioxidant Shield
White tea extract contains one of the highest concentrations of catechins found in any botanical — more than green tea. Combined with sage, these work as a protective antioxidant layer against UV-generated free radicals, pollution, and blue light exposure that accelerate dehydration.
Why Citadel Skin
How it compares
| Citadel Skin Gel | Typical Hydration Gels | |
|---|---|---|
| Dual-molecular weight HA | ✓ | ✗ |
| Sodium PCA (NMF component) | ✓ | ✗ |
| COSMOS Natural certified | ✓ | ✗ |
| 99% natural origin | ✓ | ✗ |
| Antioxidant botanical complex | ✓ | ✗ |
| 100% vegan & cruelty-free | ✓ | ✗ |
| No parabens, no synthetics | ✓ | ✗ |
Complete Your Routine
Pairs well with
Peptide Renewal Serum
Use before the gel. Peptides rebuild collagen while the gel seals in hydration on top.
All-In-One Facial Oil
Layer over the gel as your final step. Oil locks in the water-based hydration and nourishes deeply.
Hydrating Serum + Multi-HA
Maximum hydration stack for very dry or dehydrated skin. Use the serum first, gel second.
Customer Reviews
What customers are saying
★★★★★
"This has been a quiet hero in my skincare lineup. No more pulling tightness after my cleanser, just smooth, hydrated skin that looks awake. It's simple but makes such a noticeable difference day to day."
Elena✓ Verified Purchase
★★★★★
"I was at my wit's end with how dry and tight my skin felt every morning, but this gel seriously turned things around. It sinks in so nicely and keeps everything plump and happy way longer than I expected."
Mia✓ Verified Purchase
★★★★★
"My skin was really struggling with dryness until this gel. It layers beautifully under moisturizer with no pilling, just a nice dewy glow that lasts. Perfect for tough weather."
Olivia✓ Verified Purchase
FAQ
Questions? We have answers.
After cleansing and any serum, before moisturiser. Think of it as your hydration layer — it floods skin with water-binding ingredients so your moisturiser has something to lock in. On minimal-routine days, you can use it on its own.
Yes. It's lightweight enough for both. In the morning it primes skin under makeup without greasiness. In the evening it layers perfectly under heavier creams or oils.
Yes. The formula is free from synthetic fragrances, parabens, and common irritants. The aloe base makes it particularly gentle. If you have very reactive skin, patch test first on the inner arm.
The Hydrating Serum is a treatment serum with a richer formula designed for deeper delivery. The gel is a lighter, faster-absorbing layer that sits between serum and moisturiser — think of it as an additional hydration step rather than a replacement. Very dry skin benefits from both.
COSMOS is an international certification standard verified by ECOCERT — one of the world's leading organic certification bodies, recognised in both the EU and UK. It guarantees natural ingredient sourcing, environmentally responsible manufacturing, and no prohibited synthetics.
30-day money back guarantee. If it's not working for you, reach out and we'll refund you in full. No questions asked, no complicated returns process.
Hydration that actually stays.
The step most routines are missing. Add the gel and feel the difference from day one.