GHK-Cu Copper Peptide: Guide to CAS 49557-75-7 / 89030-95-5 & Formulation

CAS: 49557-75-7 | GHK-Cu | Copper Tripeptide-1 | INCI: Copper Tripeptide-1

Something unusual is happening on r/nootropics. Users are reporting they are "genuinely surprised" by GHK-Cu results, and in a community where placebo effects are aggressively scrutinized, that phrasing means something. GHK-Cu is moving from underground peptide forums into mainstream skincare consciousness, and the velocity is accelerating. Anti-aging brands that wait for the hype cycle to peak will be sourcing on backorder at inflated prices. The ones who formulate now will own the shelf space.

What Is GHK-Cu? Chemistry and Identity

GHK-Cu is a copper-binding tripeptide complex consisting of the amino acid sequence glycine-histidine-lysine (GHK) chelated with copper(II) ions. It occurs naturally in human plasma, saliva, and urine, with plasma concentrations declining significantly with age, from approximately 200 ng/mL at age 20 to 80 ng/mL by age 60.

CAS Number: 49557-75-7

INCI Name: Copper Tripeptide-1

Molecular Formula: C14H24CuN6O4

Molecular Weight: 403.90 g/mol

Appearance: Blue to blue-green powder or solution

Solubility: Freely soluble in water

The copper ion is integral to biological activity. The chelated form is what drives GHK-Cu's documented mechanism of action across wound healing, tissue remodeling, and anti-aging pathways.

The Signal: From Wound Healing Research to Mainstream Skincare

GHK-Cu's research origins are in wound healing. Dr. Loren Pickart identified the compound in the 1970s and spent decades documenting its role in tissue repair, collagen synthesis, and inflammatory modulation. The crossover happened gradually through the peptide biohacking community, accelerated by three developments:

• Cosmetic peptide adoption: Formulators added GHK-Cu to premium serums and eye creams in the early 2010s. Consumer results were notable enough to build a loyal underground following.
• Nootropic/longevity crossover: Users exploring systemic anti-aging peptides began investigating GHK-Cu for tissue remodeling and neuroprotective effects.
• Reddit signal (2024-2025): r/nootropics and r/SkincareAddiction users are now sharing detailed before/after experiences. "Genuinely surprised" is the recurring sentiment — suggesting real, observable results that exceed user expectations.

This is the exact adoption curve that preceded mainstream breakout for retinol, niacinamide, and bakuchiol. GHK-Cu is on that curve now.

Clinical Evidence: What the Research Actually Shows

Skin and Wound Healing:

• Pickart et al. (multiple publications, 1973-2015): Established GHK-Cu's role in stimulating collagen and glycosaminoglycan synthesis, accelerating wound healing, and reducing scar formation.
• Gorouhi & Maibach (2009), International Journal of Cosmetic Science: Comprehensive review confirming skin remodeling, firming, and anti-aging effects in clinical and in vitro studies.
• Kim et al. (2018): Documented upregulation of collagen I and III synthesis in human fibroblasts.

Anti-Inflammatory Action:

GHK-Cu suppresses TNF-alpha and other pro-inflammatory cytokines — relevant for formulations targeting redness, irritation, and chronic skin inflammation.

Hair Growth:

Clinical data supports GHK-Cu for stimulating hair follicle growth and increasing follicle size. Emerging opportunity for scalp and hair care formulations.

Systemic Research:

Emerging preclinical data on GHK-Cu's role in nerve growth factor (NGF) expression and neuroprotection — the nootropic community's area of interest.

The clinical picture is more robust than most novel peptides. GHK-Cu has 50+ years of peer-reviewed research behind it.

Formulator Applications: Where GHK-Cu Fits

Topical Skincare (Primary Market)

• Anti-aging serums: The highest-value application. Market rate for finished serums with GHK-Cu is $60-$200+ retail.
• Eye creams: Pairs well with Matrixyl (palmitoyl pentapeptide-4) and Argireline for comprehensive peptide stacking.
• Wound and scar recovery: Medical aesthetics and post-procedure skincare with legitimate clinical positioning.
• Hair care: Scalp serums and treatments — follicle stimulation data is solid.
• Body care: Premium body serums, stretch mark treatments, firming formulations.

Concentration Ranges:

• Topical efficacy demonstrated at 0.1-2% w/v in finished formulations
• Most commercial serums use 0.5-1% for balance of efficacy and cost
• Eye creams and sensitive-area applications: 0.1-0.5%
• Do not formulate above 2% without stability testing

Stability in Formulations: The Critical Variables

GHK-Cu is stable when handled correctly. The blue-green color is expected and desirable — loss of color indicates degradation or copper dissociation.

Key stability factors:

• pH: Optimal stability at pH 5.0-7.0. Less stable below pH 4 or in alkaline environments.
• Oxidizing agents: Avoid formulating with strong oxidizers, especially high-concentration vitamin C at low pH. Use stable vitamin C derivatives (ascorbyl glucoside) if combining.
• Heat: Avoid prolonged exposure above 40°C. Cold-process or controlled-temperature blending recommended.
• Metal ion competition: Avoid high concentrations of competing metal ions (zinc, iron) in the same formulation.
• Packaging: Amber glass or opaque airless pumps preferred. UV exposure accelerates degradation.

Compatibility: Works well with hyaluronic acid, peptides, panthenol, allantoin, niacinamide at neutral pH. Use caution with low-pH vitamin C, AHAs, and BHAs — layer separately if using both.

Shelf life: Properly formulated and packaged, 24+ months. Run accelerated stability studies (40°C/75% RH, 3 months) before launch.

Grade Considerations and Sourcing Standards

GHK-Cu is synthesized via solid-phase peptide synthesis (SPPS) followed by copper chelation. Purity and copper content are the two critical specification parameters.

What to require from your supplier:

• Purity: 98%+ by HPLC (pharmaceutical/cosmetic grade). Sub-95% is research grade — not appropriate for commercial products.
• Copper content: Verified by ICP-MS or AAS. Cu:GHK molar ratio should be 1:1.
• Heavy metals: Full panel per ICH Q3D or EU Cosmetics Regulation limits.
• Microbial testing: Per USP or equivalent standards.
• Certificate of Analysis: Batch-specific, third-party verification preferred.
• INCI documentation: Confirm supplier provides "Copper Tripeptide-1" for label and regulatory use.
• Regulatory compliance: EU Cosmetics Regulation (EC) No 1223/2009 documentation if selling into EU markets.

Red flags in the market: Suspiciously low pricing (synthesis is cost-intensive), no third-party CoA, inability to provide INCI documentation, no heavy metals data.

Why GHK-Cu Is a Strategic Formulation Decision Now

The timing argument is straightforward: ingredient awareness precedes commercial demand by 12-24 months in the mass market. The nootropic and biohacking communities are the early signal. When r/SkincareAddiction starts dominating threads, retailers will be asking for it.

Brands that formulated with niacinamide in 2017 owned the "pore-minimizing" category by 2020. GHK-Cu is on a similar trajectory, with stronger clinical backing and a more defensible price point for premium positioning.

Source GHK-Cu from Parchem

Parchem supplies GHK-Cu (CAS 49557-75-7, Copper Tripeptide-1) at cosmetic and pharmaceutical grades, with full CoA, INCI documentation, and heavy metals testing. We support development quantities through commercial-scale orders, with supply chain traceability and GMP-certified sourcing partners.

Parchem Fine & Specialty Chemicals | 415 Huguenot Street, New Rochelle, NY 10801 | (914) 654-6800 | info@parchem.com

ISO 9001:2015 Certified | FDA Registered | GMP Supply Chain