How does Copper Tripeptide-1 work?

It appears to work by signaling skin fibroblasts to increase production of collagen-promoting growth factors like TGF-β1.[6] Copper in the complex also helps activate enzymes that cross-link collagen and elastin fibers. In lab models, a nanoparticle-conjugated form of the peptide showed roughly 2.8-fold better wound closure than the free peptide alone, suggesting delivery method matters significantly.[2]

What is Copper Tripeptide-1 used for in research?

Research has explored its use in scar reduction, scalp dandruff management, hair regrowth, and wound healing. A 2025 study found a copper tripeptide-1-containing gel reduced scar appearance by about 27% in 45 days.[1] A 2024 study reported a 61% reduction in scalp flaking and 76% improvement in scalp hydration using a copper tripeptide-1 serum over 15 days.[4]

How is Copper Tripeptide-1 dosed in research?

Dosing varies considerably by application. Topical formulations, scalp serums, and injectable preparations have all appeared in the literature at different concentrations and schedules. See the dosage chart on this page for a compiled reference, and use the calculator for concentration and volume calculations. This information is for research reference only — not medical advice.

How do you reconstitute Copper Tripeptide-1?

Lyophilized Copper Tripeptide-1 powder is typically dissolved in sterile water or an aqueous buffer at a near-neutral pH. Swirl gently — do not shake hard. Once reconstituted, store in the refrigerator (2–8 °C) away from light and use within a few days. Keep unmixed powder frozen in a sealed, moisture-free container until needed. Always follow the specific protocol supplied with the research-grade material.

Is Copper Tripeptide-1 safe?

In published human studies, topical formulations containing copper tripeptide-1 have generally been well tolerated with no reported adverse effects over study periods of 15 to 45 days.[1][4] An injectable multi-ingredient formulation including copper tripeptide-1 was also reported as well tolerated across 1,000 patients.[3] However, these studies used multi-component products, and long-term safety data for isolated copper tripeptide-1 in humans remains limited.

Copper Tripeptide-1 Dosage Chart — Doses, Protocols & Calculator (Cited)

Q: What is Copper Tripeptide-1?

Copper Tripeptide-1 (GHK-Cu) is a small, naturally occurring peptide made of three amino acids — glycine, histidine, and lysine — bonded to a copper ion. It is found in human plasma and tissues. Researchers study it as a signaling molecule that may promote skin repair, collagen production, and scalp health. It is a research compound and is not approved as a drug or medical treatment.

A copper-binding peptide studied for skin remodeling.

Goal	Dose	Frequency	Duration	Evidence	Source
Cited dosing data is being compiled for this compound.

BAC water	Concentration	Volume / dose	Units (U-100)
1 mL	5 mg/mL	—	—
2 mL	2.5 mg/mL	—	—
3 mL	1.67 mg/mL	—	—

What is Copper Tripeptide-1?

Copper Tripeptide-1 — often called GHK-Cu — is a tiny, naturally occurring protein fragment made of three amino acids (glycine, histidine, and lysine) bound to a copper ion. Think of it as a miniature key that carries copper, an essential mineral, directly to skin cells and connective tissue. Because it is so small, it can slip into tissue more easily than larger proteins. Researchers classify it as a signaling peptide, meaning it sends messages to cells rather than acting as a simple building block. It has been identified in human plasma, saliva, and urine, where it is believed to play a role in wound healing and tissue repair. In the research world, it is studied as a topical and injectable compound for skin remodeling, scalp health, and hair growth applications.

How Copper Tripeptide-1 Works

Here is a simple way to picture it. Imagine your skin as a mattress. Over time, the springs (collagen and elastin fibers) wear out and the mattress sags. Copper Tripeptide-1 is studied for its potential to act like a mattress-repair crew — signaling cells called fibroblasts to get back to work producing new collagen and elastin. Fibroblasts are the skin's main structural workers. Early laboratory research found that copper tripeptide-1 stimulated fibroblasts to increase production of key growth factors — including TGF-β1 (a collagen-promoting signal) — in a manner comparable to the prescription retinoid tretinoin, though through a different mechanism.^[6] Copper also plays a direct biochemical role: it activates an enzyme called lysyl oxidase, which stitches collagen and elastin fibers together, making them stronger. Researchers have also explored how attaching the peptide to silver nanoparticles amplifies its wound-closure activity in laboratory cell models, with CuTP1-AgNP conjugates showing roughly 2.8-fold better wound closure compared to the free peptide alone.^[2]

What the Research Shows

Studies involving Copper Tripeptide-1 span several areas of skin and scalp health. Here is a plain-language summary of the key published findings:

Scar reduction: A 2025 clinical study evaluated a gel containing copper tripeptide-1 alongside other actives (L-carnitine, alpha-glucosyl hesperidin, and hyaluronic acid) in women with acne scars. After 45 days of use, scar appearance decreased by about 27%, skin smoothness improved by nearly 45%, and skin roughness dropped dramatically — all with no reported adverse effects.^[1]
Scalp and dandruff management: A 2024 prospective study tested a scalp serum containing copper tripeptide-1, witch hazel, hesperidin, hyaluronic acid, and pea protein alongside a hydroxy acid scrub. Over 15 days, adherent scalp flaking fell by over 61%, scalp hydration improved by 76%, hair density increased by about 12%, and hair thickness rose by about 25%.^[4]
Hair regrowth (injectable formulation): A large 2018 pilot clinical study of 1,000 patients used a multi-ingredient injectable formulation that included copper tripeptide-1 alongside growth factors such as VEGF and IGF. After eight sessions, 83% of patients showed significant reduction in hair fall, and at one year, a statistically significant increase in total hair count was maintained.^[3]
Nanoparticle wound healing: Laboratory (in vitro) research demonstrated that when copper tripeptide-1 is used to coat silver nanoparticles, the resulting conjugate achieves approximately 62% wound closure in fibroblast scratch assays — nearly three times better than the free peptide alone — suggesting potential in advanced wound-care formulations.^[2]
Fibroblast growth factor stimulation: Earlier laboratory work showed copper tripeptide-1 could increase TGF-β1 production by fibroblasts in a serum-free model, pointing to a collagen-stimulating mechanism at the cellular level.^[6]

What Copper Tripeptide-1 Is Being Studied For

Based on published research, Copper Tripeptide-1 is currently being investigated in the following areas:

Skin scar remodeling and texture improvement^[1]
Scalp health, seborrheic dermatitis, and dandruff reduction^[4]
Hair loss (androgenetic alopecia) and hair regrowth support^[3]
Wound healing — both as a free peptide and in nanoparticle-conjugated forms^[2]
Collagen and growth factor stimulation in fibroblast models^[6]

It is important to note that most published human studies combine copper tripeptide-1 with other active ingredients, so isolating its individual contribution requires further controlled research.

How Copper Tripeptide-1 Is Dosed in Research

Research protocols for Copper Tripeptide-1 vary widely depending on the application — topical gels, scalp serums, and injectable formulations have all been studied, each with different concentrations and frequencies. Because dosing is highly context-dependent and this is a research-use-only compound, we have compiled the available reference information in the dosage chart on this page. You can also use the on-page calculator to explore concentration and volume relationships used in published protocols. Never use this information as medical guidance.

Mixing and Storing Copper Tripeptide-1

When Copper Tripeptide-1 is supplied as a lyophilized (freeze-dried) powder for research purposes, it is typically reconstituted with sterile water or a suitable aqueous buffer. Use a slow, gentle swirling motion — avoid vigorous shaking, which can damage the peptide structure. Copper-binding peptides can be sensitive to pH extremes, so a near-neutral pH solution is generally preferred. Once reconstituted, the solution should be stored in a refrigerator (2–8 °C), protected from light, and used within a short window — typically a few days to a week — to maintain stability. For long-term storage, keep the lyophilized powder frozen and away from moisture. Always follow the specific storage guidelines provided by the supplier and the research protocol being used.

Sources

Efficacy and Safety Assessment of ThriveCo Scar Fader Gel With Scarcede™ in the Treatment of Skin Scars. — Cureus, 2025. PMID 41001334.
Effect of Peptides on the Synthesis, Properties and Wound Healing Capacity of Silver Nanoparticles. — Pharmaceutics, 2023. PMID 37896231.
Intradermal injections of a hair growth factor formulation for enhancement of human hair regrowth - safety and efficacy evaluation in a first-in-man pilot clinical study. — Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology, 2018. PMID 29482481.
An Assessment of the Safety, Efficacy, and Tolerability of a Novel Scalp Treatment Regimen Combining a Hydroxy Acid-Based Scrub and Copper Tripeptide Serum in the Management of Seborrheic Dermatitis in Adults. — Cureus, 2024. PMID 39449909.
QR678 & QR678 Neo Hair Growth Formulations: A Cellular Toxicity & Animal Efficacy Study. — Plastic and reconstructive surgery. Global open, 2020. PMID 32983753.
The effect of copper tripeptide and tretinoin on growth factor production in a serum-free fibroblast model. — Archives of facial plastic surgery, 2001. PMID 11176716.

Storage & handling

Lyophilized (freeze-dried) peptide is typically kept refrigerated and protected from light; once reconstituted with bacteriostatic water it is generally refrigerated at 2–8 °C and used within a few weeks. Follow aseptic technique to avoid contamination, per CDC injection-safety guidance.

Injection technique

Subcutaneous injections are usually given into the fat of the abdomen or thigh: clean the site with an alcohol swab, pinch the skin, insert at the recommended angle, and rotate sites to protect the tissue. See MedlinePlus for a step-by-step subcutaneous-injection guide.

General aseptic-technique and injection references for educational use — they are not specific to any research compound.

Copper Tripeptide-1 Guide & Dosage Chart