# GHK-Cu: Copper Tripeptide Research Overview Evidence & Research Status Evidence LevelPreclinical / Early-Stage Research FDA StatusNot FDA-approved for human use Regulatory StatusResearch Use Only (RUO) — not for human consumption Last UpdatedAugust 5, 2026 What This Article Covers Educational overview of a compound studied in tissue-repair and skin research. Everything here reflects the published literature — largely cell and animal models — and is for research and educational… Evidence Level reflects the general state of published research for this compound category and is not a claim about the safety, efficacy, or approval status of any product sold on this site. All compounds are offered strictly for research use. **By Charles Fowler, Founder of Portal to Wellness** · *Last reviewed: June 2026* · ~6 min read > *Educational overview of a compound studied in tissue-repair and skin research. Everything here reflects the published literature — largely cell and animal models — and is for research and educational purposes only. Not medical advice or a dosing instruction.* GHK-Cu is the recovery world’s crossover compound — equally at home in tissue-repair research and skin/aesthetic science. Here’s what it is and why it draws so much interest. For the wider recovery map, see our [Recovery & Repair Research Compounds guide](https://portaltowellness.net/research/recovery-repair-research-compounds-guide/) . Key Takeaways - GHK-Cu is a naturally occurring copper-binding tripeptide studied in recovery and skin research. - Its proposed mechanisms involve tissue remodeling and antioxidant activity. - Research has explored applications spanning wound healing to skin-related outcomes. - It’s sold as a research compound, not a consumer skincare or medical product. ## What GHK-Cu is GHK-Cu is a copper-binding tripeptide (glycyl-L-histidyl-L-lysine bound to copper) first isolated from human plasma in 1973 by biochemist Loren Pickart. It occurs naturally in plasma, saliva, and urine — and notably, the body’s GHK levels **decline with age** , which is part of why it’s studied in the context of aging and repair.[1] ## How it works What makes GHK-Cu unusual is the breadth of its activity in research models. The literature describes it stimulating fibroblast activity and the expression of genes involved in synthesizing collagen, elastin, and other structural molecules; helping balance matrix metalloproteinase (MMP) activity during the **remodeling** phase of repair; reducing pro-inflammatory signaling; and acting as an antioxidant by delivering bioavailable copper while limiting free-radical activity from unbound copper.[1] Reviews note it influences a large set of genes tied to tissue remodeling and regeneration. ## What the research explores In animal models, GHK-Cu has been studied across all phases of wound healing — modulating inflammation, stimulating the proliferative phase, and optimizing remodeling — with reported effects on wound closure, angiogenesis, and skin-graft integration. This dual identity (deep-tissue repair and skin remodeling) is why it shows up in both recovery and anti-aging research conversations. ## Where to find it GHK-Cu is included in our research-use-only [GLOW-70 blend](https://portaltowellness.net/shop/glow-70/) (GHK-Cu + TB-500 + BPC-157), and the broader [Recovery & Repair collection](https://portaltowellness.net/product-category/recovery-repair/) . ## Frequently asked questions **What is GHK-Cu?** A copper-binding tripeptide first isolated from human plasma in 1973, studied in research for collagen-related gene expression, tissue remodeling, and anti-inflammatory/antioxidant activity. **Why is GHK-Cu studied for aging?** Natural GHK levels decline with age, and research models explore its role in collagen synthesis and tissue remodeling — relevant to both recovery and skin science. **Is GHK-Cu approved for human use?** No — it’s sold for laboratory and research use only; supporting data is largely from cell and animal studies. ## Related reading [Recovery & Repair guide](https://portaltowellness.net/research/recovery-repair-research-compounds-guide/) · [BPC-157 and TB-500: Two Mechanisms Compared](https://portaltowellness.net/research/the-recovery-stack-how-bpc-157-and-tb-500-work-together/) ## About the author **Charles Fowler** is the founder and researcher behind Portal to Wellness. After a career in management consulting, he spent the past two years immersed in the wellness and research-compound space — sourcing products, vetting suppliers, and reading the primary literature daily. He isn’t a physician or a scientist, and he’ll tell you so. ## How we research our content Our Research Library articles are written from peer-reviewed scientific literature and reputable references, and we date every article. We don’t make therapeutic, dosing, or “cure” claims, and we flag where the science is preclinical or unsettled. ## References 1. Pickart L, Margolina A. *Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data.* Int J Mol Sci. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5793244/ --- *All products sold on this website are intended for research and identification purposes only. They are not intended for human dosing, injection, ingestion, or veterinary use. Must be 18 or older to purchase. This content is educational and is not medical advice.* 📚 Part of our [Recovery & Repair](https://portaltowellness.net/tissue-repair-kit/) research guide. Available at PTW GLOW-70 — GHK-Cu + TB-500 + BPC-157 Blend [Shop GLOW-70 →](https://portaltowellness.net/shop/glow-70/) ### Continue Your Research Related Articles [TB-500 (Thymosin Beta-4): What the Research Explores](https://portaltowellness.net/research/tb-500-thymosin-beta-4-research/) [Recovery & Repair Research Compounds: A Complete Guide](https://portaltowellness.net/research/recovery-repair-research-compounds-guide/) [BPC-157: What the Preclinical Research Actually Shows](https://portaltowellness.net/research/bpc-157-preclinical-research/) Related Products [BPC-157 + TB-500 Injectable – 10mg/vial (5mg BPC-157 + 5mg TB-500)](https://portaltowellness.net/shop/bpc-157-tb-500-injectable/) [GLOW-70 – GHK-Cu+TB-500+BPC-157 (50mg+10mg+10mg)/vial (Research Use Only)](https://portaltowellness.net/shop/glow-70/) Related Research Guide [Repair-Pathway Research Compounds](https://portaltowellness.net/tissue-repair-kit/) Related Category [Repair-Pathway Research Compounds](https://portaltowellness.net/tissue-repair-kit/) Related FAQ [General Research & Ordering FAQ](https://portaltowellness.net/faq/) More Research [Browse the full PTW Research Hub →](https://portaltowellness.net/research/) ## Amounts used in the published research **Read this before the numbers.** There is **no established human injectable dose for GHK-Cu.** The human evidence is *topical* — creams applied to skin. Every injected figure below comes from rodent studies, expressed per kilogram of animal body weight, and there is no validated way to convert those into a human amount. We publish these because they are what the literature actually reports, not as a protocol to follow. | Study type | Amount | Route | Detail | | --- | --- | --- | --- | | **Human** | Cream formulation | Topical | Leyden 2005 — 12-week randomized trial, 71 women with photoaged skin. GHK-Cu facial and eye cream improved skin laxity, clarity, density and thickness vs placebo. *This is the strongest human dataset and it is not injection.* | | Animal (rat) | 0.5 mg/kg | Intraperitoneal | Reduced pain response after thermal injury | | Animal (rat) | 1.5 mg/kg | Intraperitoneal | Daily for 5 days before and 5 days after chemical liver insult; hepatocyte protection | | Animal (rat) | 0.5 µg/kg | Intraperitoneal | Experimental bone fracture model | | Animal (rat) | 2 mg per injection | Direct wound-chamber | Day 0, then twice weekly for 3 weeks | | In vitro | 0.01, 1 and 100 nM | Cell culture | Human adult dermal fibroblasts; increased collagen and elastin production | | Pharmacokinetics | ~1.5–2 h | — | Reported elimination half-life | ### Sources Pickart L, Margolina A. *Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data.* Int J Mol Sci 2018 — [PMC6073405](https://pmc.ncbi.nlm.nih.gov/articles/PMC6073405/) (source for the rodent and in-vitro figures above) Leyden J et al. Randomized 12-week trial of GHK-Cu facial and eye cream, Dermatologic Surgery 2005 *Effects of topical copper tripeptide complex on wound healing in an irradiated rat model* — [PubMed 23744835](https://pubmed.ncbi.nlm.nih.gov/23744835/) *Exploring the Role of Tripeptides in Wound Healing and Skin Regeneration: A Comprehensive Review* — [Int J Med Sci](https://www.medsci.org/v22p4175.htm) Sold for research and identification purposes only. Not for human dosing, injection, or ingestion, and not for veterinary use. This page describes published research; it is not instructions for use. For guidance about your own situation, speak with a qualified healthcare professional. --- Source: https://portaltowellness.net/research/ghk-cu-copper-peptide-research/ Research use only. Terms: https://portaltowellness.net/research-use-only/