The copper-binding peptide famous for regenerating aged skin, thickening hair, and accelerating wound healing — used topically or injected.
GHK-Cu is a naturally occurring tripeptide-copper complex (Glycyl-L-Histidyl-L-Lysine bound to a copper ion). It exists in human plasma, saliva, and urine, and its levels decline significantly with age — from around 200 ng/mL at age 20 to 80 ng/mL by age 60.
It is one of the most well-researched peptides in cosmetic and regenerative medicine, with over 300+ published studies. It acts on gene expression, wound healing, and tissue remodeling pathways — and is generally considered one of the safest peptides available.
GHK-Cu is legal in topical cosmetics in most countries. Injectable use falls under research-chemical status in the US. Not WADA prohibited.
A 2010 gene-expression study found GHK-Cu modulates the expression of ~4,000 human genes — resetting many back toward a younger, healthier pattern. This is the core mechanism for its anti-aging effects.
Copper is a cofactor for lysyl oxidase (collagen crosslinking) and superoxide dismutase (antioxidant defense). GHK shuttles copper into cells where it’s needed without the toxicity of free copper.
Stimulates fibroblasts to produce collagen, elastin, and glycosaminoglycans — the building blocks of firm, elastic, hydrated skin.
Reduces oxidative stress, quenches free radicals, and lowers pro-inflammatory cytokines. Translates to less UV damage, clearer skin, and reduced wound inflammation.
Enlarges hair follicles, prolongs the anagen (growth) phase, and improves blood supply to the scalp — leading to thicker, faster-growing hair.
Well-documented in both dermatology and regenerative-medicine literature. Topical GHK-Cu is used in FDA-registered cosmetic products; injectable use is newer.
| Benefit | Evidence |
|---|---|
| Skin regeneration | Controlled studies show reduced wrinkles, improved firmness and thickness, better hydration within 12 weeks |
| Hair regrowth | Clinical data shows thicker hair diameter, increased follicle count; used in commercial hair-loss products |
| Wound healing | Accelerates closure in animal and human wounds; used in post-surgical and burn care |
| Anti-aging gene reset | Reverses ~4000 age-related gene expression patterns (Hong et al. 2012) |
| Scar reduction | Improves appearance of scars; reduces hypertrophic scar formation |
| Nerve regeneration | Preclinical data for peripheral nerve repair |
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Start Tracking FreeTopical is safer and widely available, but keep in mind GHK-Cu is a fairly hydrophilic molecule with limited passive permeation through the lipophilic stratum corneum (PMID 39795193); delivery vehicles (liposomes, nanoparticles, microneedling) significantly affect how much actually reaches the dermis. Topical and injectable are not strictly equivalent — injectable likely achieves meaningfully higher dermal and systemic concentrations. Injectable is more commonly used for hair and systemic effects.
Topical application of 2–5% GHK-Cu solution directly to the scalp, 1–2× daily. Often combined with minoxidil, dermarolling, or finasteride for synergistic effect.
GHK-Cu injectable comes as a lyophilized blue-tinted powder (copper gives it color). Reconstitute with bacteriostatic water.
50 mg vial + 2 mL BAC water = 25 mg/mL
| Dose | Volume | Syringe Units |
|---|---|---|
| 1 mg | 0.04 mL | 4 units |
| 2 mg | 0.08 mL | 8 units |
| 3 mg | 0.12 mL | 12 units |
50 mg vial at 2 mg/day = 25 days
Use our free peptide calculator to figure out your reconstitution volume, draw amount, and syringe units.
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GHK-Cu has one of the best safety profiles of any research peptide — it is endogenous, and copper binding is self-limiting.
Topical or injectable?
For skin: topical is simpler, cheaper, and very effective. For hair: topical at the scalp. For systemic regeneration and wound healing: injectable.
How fast do I see skin results?
Hydration and texture within 2–4 weeks. Fine lines and firmness by 8–12 weeks. Deeper wrinkles and sun damage improve over 6+ months.
Why is it blue?
The copper (II) ion gives the solution a deep blue color. If it loses its color, the copper has dissociated and it’s no longer active — discard.
Can I stack GHK-Cu with BPC-157 or TB-500?
Yes — GHK-Cu complements both by providing the copper cofactor needed for collagen crosslinking during tissue repair.
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Build your protocol, log every dose, monitor your body's response, and get reminders so you never miss a dose.
Start Tracking FreeDisclaimer: This guide is for educational and informational purposes only and is not intended as medical advice, diagnosis, or treatment. The compounds discussed are not FDA approved for human use. Always consult a qualified healthcare provider before starting any new supplement or peptide protocol. StackTrax does not sell peptides or supplements directly — purchase links go to third-party vendors. StackTrax is not responsible for the products, quality, or business practices of any third-party vendor. This page contains affiliate links — StackTrax may earn a commission on purchases at no extra cost to you.
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