Sodium Hyaluronate (1.5%)
Why we chose it:
The salt form of hyaluronic acid. It draws water to the surface of the skin and holds it there, so skin looks plumper and feels hydrated from the first drop.
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Image 1 of 8: SKYN Copper Peptides Firming Serum bottle
622 reviews
Copper Peptides (GHK-Cu) Firming Serum
A breakthrough Korean firming serum that helps visibly firm, smooth, and plump the look of your skin. It softens the appearance of fine lines and dehydration and leaves your complexion supple, refreshed, and more resilient-looking, without the sting or flaking of harsher actives.
Powered by 0.10% Copper Tripeptide-1 (GHK-Cu) for firmness that builds with consistent use, and 1.5% Sodium Hyaluronate for hydration you feel from the first drop. A weightless six-ingredient formula with no fillers and no added fragrance. Modern Korean skin science, distilled to what your skin actually needs.
30 mL / 1.0 fl oz
- Just 6 Ingredients
- 0.10% Copper Peptides Visibly Firm & Smooth
- 1.5% Sodium Hyaluronate Hydrates & Plumps
- No Fillers, No Added Fragrance
Try it risk-free for 60 days. If you’re not totally in love with your results, we will refund you 100%
- Firms — Helps improve the appearance of firmness with consistent use
- Smooths — Softens the look of fine lines and uneven texture
- Hydrates — Delivers lasting-feeling hydration from the very first drop
- Plumps — Leaves skin looking fuller, suppler, and visibly refreshed
Apply 2 to 3 drops to clean, dry skin across face and neck. Press and pat gently instead of rubbing, then pause about 30 seconds before your next step. A little goes further than you think, and extra drops will not speed anything up. Use AM, PM, or both.
Follow with your moisturizer to seal in hydration, and always wear SPF in the morning. This serum layers easily with hyaluronic acid, ceramides, and niacinamide. If you use vitamin C, strong acids, or retinol, keep them in a separate routine rather than stacking them directly on top.
Pro tip: Take it down over your jaw and neck. That’s the first place most people notice firmness slipping, and the easiest place to skip.
- Face — forehead, cheeks, around the mouth (avoid direct contact with eyes)
- Jaw + neck — under the chin and along the jawline, where firmness goes first
- Chest + hands — the thin, sun-exposed skin most routines skip
- Avoid — broken or irritated skin, and directly in the eyes
Formulated with 6 ingredients. Two are featured actives. Four earn their place:
- Copper Tripeptide-1 (GHK-Cu) 0.10% — Featured active for firmer, smoother-looking skin
- Sodium Hyaluronate 1.5% — Featured active for lasting-feeling hydration and a plumper look
- Water — The base that carries everything else
- Pentylene Glycol — Humectant that also helps keep the formula fresh
- Phenylpropanol — Works alongside pentylene glycol to protect the formula
- Sodium Hydroxide — Trace pH adjuster, neutralized in production, holds the peptide stable
Free from: Added Fragrance, Essential Oils, Parabens, Phenoxyethanol, Sulfates, Silicones, Mineral Oil, Drying Alcohols, Artificial Dyes, Fillers.
Copper peptides serum videos
Korean skin science
GHK-Cu Copper Peptide Technology
A copper-bound peptide your body already makes. Concentrated into a daily serum for firmer, smoother-looking skin.
Copper Tripeptide-1, better known as GHK-Cu, is a short chain of three amino acids holding a single copper ion. It’s one of the most studied peptides in modern skincare, and one of the most fragile. Drop the pH too low, or put the wrong ingredient beside it, and the copper lets go. SKYN’s GHK-Cu Copper Peptide Technology is built around protecting that bond: 0.10% GHK-Cu held in a six-ingredient base with nothing in it that competes for the copper.
- Helps improve the appearance of firmness
- Softens the look of fine lines and dehydration
- Supports smoother, more refined-looking texture
- Formulated to keep copper bound to the peptide
- Gentle enough to use morning and night
Purposeful Korean formulation
Plus 5 Purposefully Chosen Ingredients
Alongside GHK-Cu, five more ingredients. One is a second featured active. The rest do the quiet work of carrying, protecting, and stabilizing the formula. Not one of them is in the bottle to bulk it out.
Water
Why we chose it:
Not filler. It’s the base that dissolves and carries everything else, and it’s what keeps the serum light enough to disappear under your moisturizer.
Pentylene Glycol
Why we chose it:
A humectant that pulls double duty. It conditions and softens while helping keep the formula protected, which is how we skip parabens and phenoxyethanol entirely.
Phenylpropanol
Why we chose it:
The second half of a gentle two-part preservation system. It keeps the formula protected through every use, without the harsher preservatives most serums rely on.
Sodium Hydroxide
Why we chose it:
A trace pH adjuster, neutralized during production. It holds the formula at the narrow pH where copper stays bound to the peptide.
Real People. Real Skin.
You’ve read what’s in the bottle. This is what it looks like on skin. Unretouched photos and unedited words, from people using it in their own bathroom lighting.
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How We’re Different
Six ingredients. Both actives disclosed. Nothing here you have to take on faith.
| Feature |  SKYN |  Other Brands |
|---|---|---|
| Disclosed Concentrations | 0.10% GHK-Cu and 1.5% Sodium Hyaluronate, printed on the label | A percentage with no explanation, or none at all |
| Six-Ingredient Formula | Six ingredients, every one named and explained | Commonly 30 to 50 ingredients on one label |
| Layering Freedom | Layers with hyaluronic acid, ceramides and niacinamide | Published lists of what you can’t combine it with |
| Gentle Preservation | No added fragrance, no parabens, no phenoxyethanol | Added fragrance and multiple preservatives are common |
| Weightless Finish | Absorbs in seconds and layers cleanly under SPF | Tacky finish that can pill under makeup |
Questions
Frequently Asked Questions
SKYN’s Copper Peptides Firming Serum features GHK-Cu (Copper Tripeptide-1) and Hyaluronic Acid in a minimalist six-ingredient formula—with no fillers, fragrances, or unnecessary additives.
Copper Tripeptide-1 is a reparative peptide that helps protect the skin from damage, support collagen production, and restore moisture. The result is a firmer, more hydrated complexion with a visible reduction in the appearance of fine lines.
Yes. Copper peptides are a popular anti-aging ingredient for men because GHK-Cu supports skin elasticity, firmness, and overall repair.
SKYN’s fragrance-free formula contains only six ingredients, making it easy to add to a simple skincare routine. It’s also an excellent starting point for anyone new to active skincare.
Apply a small amount to clean, dry skin in the morning or evening. Gently massage the serum into your skin, allow it to absorb, and follow with moisturizer.
It layers well with Hyaluronic Acid and other peptide serums. Avoid using copper peptides in the same routine as direct Vitamin C or strong exfoliating acids. Instead, alternate between products—for example, using one in the morning and the other in the evening.
Copper peptides and retinol work in different ways.
Retinol accelerates skin-cell turnover but may cause irritation, peeling, dryness, and increased sun sensitivity. Copper peptides support collagen production and the skin’s natural repair process without the same common side effects.
For people with sensitive skin or those who cannot tolerate retinol, copper peptides may provide a gentler path toward firmer, smoother-looking skin. Some people alternate between both ingredients to receive their complementary benefits.
Many users notice improvements in hydration and skin texture within four to six weeks of consistent daily use.
More visible improvements in firmness and the appearance of fine lines may develop over eight to twelve weeks because collagen remodeling is a gradual process. Consistent use is more important than occasional or excessive application.
SKYN’s formula contains only six ingredients and is free from parabens, sulfates, dyes, fragrances, and essential oils, making it suitable for most skin types.
If you have particularly sensitive or reactive skin, perform a patch test on your neck or another small area before applying the serum to your entire face. Discontinue use if irritation occurs.
Still unsure? We would rather you asked than guessed — get in touch.
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