A peptide your skin already makes — just less of it with age
GHK-Cu: one of the most studied peptides in skincare. 6 ingredients. No noise.
GHK-Cu — Copper Tripeptide-1 — is one of the most extensively studied peptide actives in dermatology. It's been studied for its role in visibly firmer, smoother skin and softer-looking fine lines with consistent use. Asterwood's Copper Peptides Serum delivers it at 0.10% alongside 1.50% Hyaluronic Acid in just 6 ingredients — no fragrance, no silicones, no filler. A lot of skincare adds complexity to justify a price point. This one doesn't. Just the active, at a concentration chosen to perform.*
30-Day Money-Back Guarantee — try it risk-free.
Why copper peptides?
The peptide researchers have studied for decades is in this serum.
Elasticity is what gives young skin that bounce-back quality. It's what allows skin to snap back after expressions, maintain firmness through the day, and look smooth and firm. As we age, elasticity declines — and GHK-Cu (Copper Tripeptide-1) is one of the most research-backed peptides for supporting its visible recovery. Asterwood's Copper Peptides Serum puts this active in an ultra-clean 6-ingredient formula that absorbs fast and layers under any moisturizer. Start with 2 to 3 drops. See what six weeks does.*
Your skin isn't broken
It just makes less of the peptide over time — the same way hydration and bounce naturally change with age.
50+ years of research
GHK-Cu is one of the most-studied peptides in skin science, researched for over half a century.
Put it back in
Asterwood gives you clinically-studied GHK-Cu at an active concentration — in a clean, 6-ingredient Hyaluronic Acid base. The blue-green color is the GHK-Cu being active.*
What it does for your skin
Firmer skin isn't luck. It's what happens when you give it the right peptide.
Firmer skin doesn't happen by accident. It happens when you give your skin the building blocks it needs — consistently, every day. GHK-Cu (Copper Tripeptide-1) is the peptide that supports the look of elasticity and firmness. Applied topically, it absorbs quickly and gets to work. Asterwood's Copper Peptides Serum pairs it with 1.50% Hyaluronic Acid for immediate hydration, so your skin feels results right away and continues to improve over weeks of consistent use. Apply 2–3 drops morning or night. Layer with moisturizer. Let time do the rest.*
Firmer-Looking Skin
Helps visibly improve the appearance of firmness and elasticity with consistent use — skin that looks more resilient and bounced-back.*
Refined Texture
Supports a visibly smoother, more even skin surface and softens the look of fine lines over time.*
Plump, Quenched Skin
1.50% Hyaluronic Acid — a natural polysaccharide that draws and holds moisture — for immediate, lasting hydration and a supple, plumped finish.
What to expect, week by week
Visible elasticity. Softer-looking fine lines. Smoother texture. This is what GHK-Cu does.
Here's what consistent use of the Copper Peptides Serum looks like over time: In the first week, skin feels hydrated and smoother. By weeks 3 to 4, texture is more refined and tone looks more even. By weeks 6 to 8, visible firmness and elasticity improvements become noticeable. By week 12+, the most visible results with consistent use. GHK-Cu — one of skincare's most-researched actives — works on a biological timeline, not an overnight one. But consistency pays off. Six ingredients. Nothing in the way of the active doing its job.*
Skin feels hydrated, soft, and smooth.
Improved softness and a subtle, healthy radiance.
A more refined, even-looking skin surface.
Visibly improved firmness, elasticity, and softer-looking fine lines.*
Maximum visible benefits with continued daily use.
Individual results may vary.
Proven ingredients
Six ingredients. One hero active. One of the most researched peptides in skincare.
Plenty of anti-aging serums bury the active in long ingredient lists. Asterwood does the opposite. The Copper Peptides Serum has 6 ingredients total — GHK-Cu at 0.10%, Hyaluronic Acid at 1.50%, and four supporting ingredients that make the formula stable and fast-absorbing. No fragrance. No silicones. No unnecessary additives. Just one of the most research-backed peptides in skincare, in a formula clean enough to layer with anything. For a serious anti-aging serum that doesn't overcomplicate — this is it.*
GHK-CU 0.10%
Copper Tripeptide-1
The hero active. GHK is a tripeptide — three amino acids — that binds with copper to become GHK-Cu, the copper peptide your skin naturally contains. Studied for over 50 years and prized for supporting the look of firmer, smoother skin. Its natural blue-green hue is what gives the serum its color.*
Sodium Hyaluronate · 1.50%
Hyaluronic Acid
A natural polysaccharide that retains moisture in the body — it draws hydration into skin for a plumper, more supple appearance, and helps every active absorb better.
The Clean Base
Water · Pentylene Glycol · Phenylpropanol · Sodium Hydroxide
A minimalist carrier, a humectant, a gentle preservative, and a touch of pH balancer. No filler. Nothing that doesn't earn its place.
How to use
Two minutes, morning or night
Cleanse
Start with clean, dry skin so nothing competes with the active.
Apply 2–3 drops
Press and pat gently into face and neck until fully absorbed.
Lock it in
Follow with moisturizer. In the morning, finish with SPF.
Tips for use
- Use AM and/or PM, daily.
- Layers cleanly over Hyaluronic Acid and under moisturizer.
- Keep strong AHAs/BHAs and high-dose Vitamin C to a separate step.
- Patch test first on the neck, especially for sensitive or copper-sensitive skin. For external use only; avoid the eye area.
Why Choose Us
Comparison reflects ingredient counts and disclosures typical of multi-ingredient facial serums based on publicly available label data, as of May 2026. Individual products vary.
| Asterwood Copper Peptides | Typical multi-ingredient serum | |
|---|---|---|
| Ingredient count | 6 | 20–35+ |
| Added fragrance | None | Often |
| Silicones / fillers | None | Common |
| Hero active disclosed by % | GHK-Cu 0.10% · HA 1.50% | Rarely |
| Developed by chemists · third-party tested | Yes* | Varies |
What real reviewers say
The results speak for themselves
Great results, Stick with it!
I’ve been using this consistently for the past 3 months and it’s a game changer! Major reduction in fine lines and my skin looks great!
The most important daily for me.
I've been applying this every morning for almost 2-years now, the improvement is very noticeable after a few days.
Buy it!
Wow! This really hydrates the skin. A little goes a long way so it’s sure to last awhile. Will buy again!
Build your routine
It works even better in good company
Hyaluronic Acid
The brand's hydrating foundation. Lay it down first so copper peptides absorb on perfectly primed skin.
Copper Peptides Serum
Your firming serum layer. The one you came for.
Hypochlorous Acid Facial Mist
A 3-ingredient mist to soothe and refresh — calming, comfortable prep for sensitive skin.
Before you buy
Questions, answered
GHK-Cu (Copper Tripeptide-1) is a small copper-bound peptide and one of the most extensively studied actives in dermatology. In skincare it's valued for supporting the look of firmer, smoother, more refined skin. Our serum uses it at 0.10%, paired with 1.50% Hyaluronic Acid.*
It does — GHK-Cu is a copper-bound peptide your body produces naturally, with the highest levels when you're young. Like hydration and bounce, your natural supply tends to taper with age. That's the thinking behind topping it back up topically with an active-level formula. The peptide has been studied for over 50 years.*
That color isn't a dye — it's the copper peptide itself. The natural blue-green hue is a built-in sign that the GHK-Cu in the bottle is present and active. We never add synthetic colorants.
Skin feels hydrated and smooth from day one. Most people notice improved softness within 1–2 weeks, a more refined surface around 3–4 weeks, and visibly improved firmness and softer-looking fine lines around 6–8 weeks of consistent daily use. Individual results may vary.*
Yes — it layers cleanly over Hyaluronic Acid and under moisturizer, morning or night. Keep strong exfoliating acids (AHA/BHA) and high-dose Vitamin C to a separate step or routine so nothing competes.
It's fragrance-free, silicone-free, and built on just six ingredients, which many people with sensitive skin appreciate. As with any new active, patch test on your neck first — especially if you have known copper sensitivity. For external use only; avoid the eye area.
No parabens, sulfates, phthalates, dyes, or synthetic fragrance. Vegan and never tested on animals. Developed by chemists, third-party tested, and made in the USA of domestic and globally sourced ingredients.*
Put the peptide back. Visibly firmer, smoother skin.
Visibly firmer skin. Visibly smoother texture. More resilient-looking over time, with consistent use. Simple. Clean. Effective.*
Free shipping · Clean, third-party-tested formula · Cancel a subscription anytime
Always free of parabens, sulfates, fragrances, and dyes. Never tested on animals.
*Describes the cosmetic appearance benefits of this product. This product is intended to improve the look of skin and does not alter its structure or function. Individual results may vary. Made in the USA of domestic and globally sourced ingredients. Statements have not been evaluated to diagnose, treat, cure, or prevent any disease. For external use only; avoid direct contact with eyes; discontinue use if irritation occurs.
