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4.8 FROM 127 REVIEWS • 95% RECOMMEND
Shown to help visibly reduce the appearance of wrinkle volume by up to 55.8%*
GHK-Cu — Copper Peptide
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Clinically-relevant dose
Backed by published research
Made for daily-use
As we age, our GHK-Cu levels change 50-70%
Aging skin is closely associated with changing GHK-Cu levels.
GHK-Cu plasma concentration (ng/mL)
Formulated with a high-potency concentration of GHK-Cu—significantly higher than standard market serums.*
Meet the heros
Every single ingredient has earned its place.
Niacinamide
GHK-Cu
Centella Asiatica
Each included at a focused, high concentration level.
Results are based on a 12-week clinical study of the active ingredient, GHK-Cu, measuring visible improvements in skin appearance and surface texture. Individual results may vary.*
Based on consistent daily use.
Subscribers receive their next bottle automatically before they run out, so there's no gap in use.
THE SERUM PROBLEM
Not all serums are built the same.
While standard serums often vary in potency and research, Caspian & Grey is built on transparency and high-concentration formulas backed by clinical studies.
Developed by scientists.
Studied by dermatologists.
Studied for 30+ years
10+ clinical studies
Works at the cellular level
Formulated in Texas
C&G GHK-Cu Serum
1 Pack
$67.00
Sale price
$67.00
Regular price
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C&G GHK-Cu Serum
1% GHK-Cu — High-potency concentration
A clinically studied copper peptide that visibly firms, smooths, and refines the look of skin. Formulated with 1% GHK-Cu — one of the most researched peptides in dermatology, now paired with 5 additional clinical actives in a single serum.
6 Clinical actives at real doses
Visibly firms and smooths the look of skin
Never run out — auto-delivered on your schedule
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Why you'll love it.
Contains ingredients trusted by dermatologists.
GHK-Cu (Copper Peptide)
Fermented Reishi + Shiitake
Acetyl Hexapeptide-8
Niacinamide
Sodium Hyaluronate
Centella Asiatica
GHK-Cu (Copper Peptide)
Fermented Reishi + Shiitake
Acetyl Hexapeptide-8
Niacinamide
Sodium Hyaluronate
Centella Asiatica
Frequently asked questions
Can I cancel anytime?
Yes. There's no contract and no cancellation fee. You can cancel, skip, or delay a shipment anytime from your account — no phone calls or emails required. A link to manage your subscription is in every shipping confirmation email and in the site footer.
How long until I see results?
Most customers notice visible changes in skin texture and firmness within 4 to 6 weeks of consistent daily use. Like any topical serum, results depend on how regularly you use it — applying it once a day every day gives your skin the best chance to respond. Full results are typically more noticeable at the 8 to 12 week mark.
What makes Caspian & Grey different from other serums?
Most serums on the market use GHK-Cu copper peptide at concentrations of 0.1% or lower — often as a minor ingredient buried in a long formula list. Caspian & Grey is formulated at 1% concentration, ten times higher than the category standard, with no filler actives diluting it. If you've tried copper peptide products before and didn't see results, concentration is almost always the reason.
Can men use this too?
Most serums on the market use GHK-Cu copper peptide at concentrations of 0.1% or lower — often as a minor ingredient buried in a long formula list. Caspian & Grey is formulated at 1% concentration, ten times higher than the category standard, with no filler actives diluting it. If you've tried copper peptide products before and didn't see results, concentration is almost always the reason.
How do I use it?
Apply a small amount to clean, dry skin once daily — morning or evening, whichever fits your routine. Less is more with a high-concentration serum. A few drops is all you need. It layers cleanly under moisturizer or SPF if you use them, but works fine on its own too.
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References & Disclaimers:
* Clinical data is based on independent in-vrito and/or in-vivo testing of the isolated active ingredient GHK-Cu, not the finished Caspian & Grey serum. Individual results may vary.
* Badenhorst et al. (2016). Randomized double-blind clinical trial on topical GHK-Cu nano-carrier formulation. Journal of Cosmetic Dermatology.
* Finkley et al. (2005). 12-week study of topical GHK-Cu in 67 women aged 50–59. American Academy of Dermatology.
*Pickart, L. (2008). The human tri-peptide GHK and tissue remodeling. Journal of Biomaterials Science.|
* Pickart, Vasquez-Soltero, and Margolina (2018). The Effect of the Human Plasma Molecule GHK-Cu on Stem Cell Actions and Expression of Relevant Genes. OBM Geriatrics.
* Varani et al. (2006). Decreased Collagen Production in Chronologically Aged Skin. American Journal of Pathology, 168(6), 1861-1868.
* In a clinical study, participants observed up to a 55.8% reduction in the appearance of wrinkle volume, 32.8% in wrinkle depth, and up to 51% firmer, denser-looking skin.
* Based on a 12-week clinical study of the active ingredient GHK-Cu (Badenhorst et al., 2016), not a study of this specific product.
* Based on internal formulation comparisons against standard cosmetic GHK-Cu concentrations of 0.10%. This product is a cosmetic and is not intended to diagnose, treat, cure, or prevent any disease.