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Peptide Renewal Serum
$33.99/mo
COSMOS Natural
99% Natural Origin
Vegan
Peptide Renewal Serum
1.01 fl oz (30ml)
A multi-peptide treatment that rebuilds collagen, plumps fine lines, and restores elasticity. With Hexapeptide-11 and Hydrolyzed Hyaluronic Acid working in synergy, this 99% natural origin serum delivers visible anti-aging results.
Supports collagen synthesis with Hexapeptide-11
Plumps fine lines with deep-penetrating Hydrolyzed HA
Antioxidant protection from blueberry & strawberry seed oils
Natural fragrance from essential oils · vegan · suitable for sensitive skin
Week 1–2
Hydration & texture
Skin feels softer, dryness eases
Week 2–4
Glow & tone
Brighter, fine lines less visible
Week 4+
Firmness
Collagen support builds over time
Purchase Option
Free Shipping
30-Day Guarantee
ECOCERT Certified
1
Cleanse your skin
Begin your evening routine with a gentle cleanser. Pat dry, leaving skin slightly damp for optimal serum absorption.
2
Apply the serum
Dispense 2–3 drops onto fingertips. Gently press and pat into face and neck, including the eye area. Allow a moment to absorb.
3
Follow with moisturiser or oil
For dry skin, layer a moisturiser or facial oil over the serum to seal in the active ingredients.
4
Be consistent
Use nightly for best results. Most customers notice visible improvements in texture and firmness within 3–4 weeks.
Hexapeptide-11
A signaling peptide that supports collagen synthesis from within. Clinically shown to improve elasticity and reduce wrinkle depth with consistent use.
Hydrolyzed Hyaluronic Acid
Lower molecular weight than standard HA — penetrates deeper to plump fine lines from within and deliver lasting hydration.
Dipalmitoyl Hydroxyproline
A key component in collagen structure that helps repair and maintain skin elasticity, restoring the bounce and suppleness of younger skin.
Blueberry & Strawberry Seed Oils
Potent antioxidant protection against UV, pollution, and blue light while nourishing mature skin with essential fatty acids.
Ginkgo Leaf Extract
Enhances microcirculation, bringing vital nutrients and oxygen to skin cells for a healthier, more radiant complexion.
Sodium PCA
A natural humectant that locks in moisture for up to 24 hours, maintaining optimal hydration throughout day and night.
Full Ingredient List (INCI)
Aloe Barbadensis (Aloe) Leaf Juice*, Glycerin, Simmondsia Chinensis (Jojoba) Seed Oil*, Aqua/Water, Pentylene Glycol, Cetearyl Alcohol, Sodium PCA, Isoamyl Laurate, Glyceryl Stearate Citrate, Dipalmitoyl Hydroxyproline, Propanediol, Parfum/Fragrance, Caprylic/Capric Triglyceride, Fragaria Ananassa (Strawberry) Seed Oil, Vaccinium Myrtillus (Blueberry) Seed Oil*, Xanthan Gum, Hexapeptide-11, Phytosterols, Ricinus Communis (Castor) Seed Oil*, Ascorbyl Palmitate, Hydrolyzed Hyaluronic Acid, Potassium Hydroxide, Sodium Hyaluronate, Sodium Phytate, Tocopherol, Leuconostoc/Radish Root Ferment Filtrate, Ginkgo Biloba Leaf Extract, CI 77491 (Iron Oxides)**, Citric Acid, Sodium Benzoate, Potassium Sorbate, Glycolipids, Linalool***, Geraniol***, Citronellol***
* Ingredients from organic farming · ** Pure mineral pigments · *** From natural essential oils
* Ingredients from organic farming · ** Pure mineral pigments · *** From natural essential oils
99%
Natural Origin
Every ingredient is derived from natural sources. Nothing synthetic, no fillers.
20%
Organic Content
Certified organic ingredients make up 20% of the formula.
✓
COSMOS Natural
Certified by ECOCERT — the global standard for natural and organic cosmetics.
Also: 100% vegan · cruelty-free · free from synthetic fragrances, parabens, and harsh chemicals · ethically sourced botanicals.
The Science
Science-backed ingredients for visible results
Hexapeptide-11 — Collagen Rebuilder
This powerful signaling peptide stimulates your skin's natural collagen synthesis, helping to rebuild the structural foundation that keeps skin firm and resilient. Clinical studies show improved elasticity and reduced wrinkle depth with consistent use.
Hydrolyzed HA — Deep Hydration
Unlike standard hyaluronic acid, our hydrolyzed form has a lower molecular weight, allowing it to penetrate deeper into skin layers. This delivers intense hydration where it matters most, visibly plumping fine lines from within.
Dipalmitoyl Hydroxyproline — Elasticity Repair
A key component in collagen structure, it helps repair and maintain skin elasticity, supporting the skin's natural renewal process and restoring the bounce associated with youthful skin.
Antioxidant Seed Oil Complex
Blueberry and Strawberry Seed Oils deliver potent antioxidant protection, shielding your skin from environmental damage while nourishing mature skin with essential fatty acids and vitamins.
Why Citadel Skin
Why Citadel Skin stands apart
| Citadel Skin | Typical Brands | |
|---|---|---|
| 99% natural origin ingredients | ✓ | ✗ |
| COSMOS Natural certified | ✓ | ✗ |
| Multi-peptide complex | ✓ | ✗ |
| 100% vegan & cruelty-free | ✓ | ✗ |
| Deep-penetrating Hydrolyzed HA | ✓ | ✗ |
| Antioxidant botanical seed oils | ✓ | ✗ |
| Subscribe & save 15% | ✓ | ✗ |
Complete Your Routine
Pairs well with
Hydrating Serum + Multi-HA
Use in the morning. Deep hydration that plumps fine lines from within.
All-In-One Facial Oil
Use at night after the serum. Seals in actives and nourishes deeply.
AHA Peeling Concentrate
Use 1–2 evenings per week instead of the serum. Brightens and refines.
Customer Reviews
Real results from real customers
★★★★★
"After just three weeks, the fine lines around my eyes have visibly softened. My skin feels firmer and has this beautiful, healthy glow I haven't seen in years."
Catherine M.✓ Verified Purchase
★★★★★
"My skin texture has transformed completely — smoother, firmer, and more radiant than ever. Finally, a serum that actually delivers on its promises."
Rebecca L.✓ Verified Purchase
★★★★★
"This serum gave me back the confidence I lost in my 40s. My skin looks healthier, feels stronger, and has that lit-from-within glow I never thought I'd see again."
Michelle C.✓ Verified Purchase
★★★★★
"I've been using this for about a month and my skin just looks…better. My forehead lines are softer and my face doesn't look as tired in the mornings."
Anna K.✓ Verified Purchase
★★★★★
"Nothing dramatic overnight, but over time my skin just looks healthier. Texture is more even, I'm less dull, and my cheeks feel plumper."
Daniela✓ Verified Purchase
★★★★★
"I'm 41, not a skincare guy at all — my girlfriend made me start using this at night. Few weeks later, skin's smoother, looks less worn out. Might keep it up."
Mark T.✓ Verified Purchase
FAQ
Questions? We have answers.
The Peptide Renewal Serum is formulated for mature, dry, and normal skin types. Its gentle, natural-origin formula is well-tolerated by most skin, including sensitive complexions. If you have specific concerns, we recommend patch testing first.
Most customers notice improved hydration and skin texture within 1–2 weeks. Visible reduction in fine lines and improved firmness typically appears after 3–4 weeks of consistent nightly use. For optimal anti-aging benefits, we recommend continued use for 8–12 weeks.
Yes — the serum is gentle enough to use around the eye area. Apply to the orbital bone area and let it absorb naturally. Avoid direct contact with the eyes themselves.
Yes, this serum pairs well with most skincare ingredients. If you're using retinoids or strong acids, consider alternating nights to avoid potential irritation. Always follow with sunscreen during the day.
COSMOS certification is a rigorous international standard for organic and natural cosmetics, verified by ECOCERT. It guarantees our formula uses responsibly sourced natural ingredients, environmentally friendly processes, and sustainable practices.
30-day money back guarantee on all products. If you're not satisfied, reach out and we'll refund you in full. No complicated process, no questions asked.
Transform your skin tonight.
Join thousands who've discovered the power of peptide science combined with natural purity.