The short version of copper tripeptide-1 fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-05-22 and is reviewed periodically as new material appears.
The International Nomenclature of Cosmetic Ingredients lists the substance as copper tripeptide-1, the name that appears on most topical product labels. Related designations include copper peptide and GHK-Cu, and the hyphenated form is common in research literature. In cosmetics the material is regulated as an ingredient rather than as a drug, so products may reach the market without evidence of the effects claimed for them. Whether those effects are clinically meaningful is an open question, since most supportive data come from laboratory work and small trials.
GHK-Cu is the copper complex of the tripeptide glycyl-L-histidyl-L-lysine, a short sequence found naturally in human plasma, saliva and urine. Loren Pickart reported the isolation of the free peptide in 1973 while studying factors that influenced the growth of aged liver cells in culture. The peptide was later shown to bind copper(II) with high affinity, and the metal-bound form became the focus of most subsequent research. Its concentration in circulation declines markedly with age, a pattern that is well documented, though the physiological consequences of that decline remain debated.
The peptide portion consists of three amino acids: glycine, histidine and lysine. Copper(II) coordinates through the imidazole nitrogen of histidine, the alpha-amino group of glycine and a deprotonated amide nitrogen of the backbone, producing a roughly square-planar geometry. This arrangement gives the complex its characteristic blue-to-violet colour and helps it resist dissociation in water. Reported stability constants are high, although values differ between studies because of differences in ionic strength and measurement method.
Stability of GHK-Cu is influenced by light, oxygen, moisture, pH, and temperature. Solid material is generally kept desiccated and frozen to reduce hydrolysis and oxidation, while aqueous solutions are best prepared fresh or stored cold in aliquots. Repeated freeze-thaw cycles can promote aggregation, precipitation, or peptide degradation. Copper coordination may change under strongly acidic or alkaline conditions, potentially altering the complex's spectroscopic properties. Published long-term stability data for specific matrices, such as cosmetic emulsions or biological buffers, are limited, so shelf-life claims should be treated as formulation-specific rather than universal.
Quality control for GHK-Cu relies on documentation and independent testing rather than a single accepted standard. A certificate of analysis may report peptide purity, copper content, residual solvents, water content, and microbial limits, but the underlying methods and acceptance criteria vary by supplier. Verification can include mass confirmation, amino acid analysis, and comparison with a reference standard when one is available. Open questions include how different copper-binding modes or peptide isomers affect measured activity and whether conventional purity assays capture those differences. Buyers of research-grade material typically need to request raw data rather than rely solely on a summary certificate.
| Property | Value | Notes |
|---|---|---|
| INCI name | Copper tripeptide-1 | Standard designation on cosmetic ingredient labels |
| Peptide sequence | Gly-His-Lys | Three-residue ligand; binding occurs at the histidine side chain |
| Metal-to-peptide ratio | 1 to 1 | One copper(II) ion per peptide unit |
| Appearance | Blue to violet powder | Colour arises from copper-to-peptide electronic transitions |
| Water solubility | Freely soluble | Commonly formulated in aqueous or water-alcohol systems |
Commercial products list GHK-Cu as copper tripeptide-1, a cosmetic ingredient. Formulators value its blue color and water solubility, which allow incorporation into serums, creams, and masks. Regulatory treatment varies: in the United States it appears in cosmetics, while some jurisdictions classify certain claims as drug-like. The compound is not an approved drug for any indication. Studies continue to examine its effects on skin, hair, and wound repair, but dosage, delivery, and long-term safety questions remain open.
GHK-Cu is a coordination complex formed between the tripeptide glycyl-L-histidyl-L-lysine and copper(II). The peptide sequence consists of glycine, histidine, and lysine, and its imidazole and amino groups provide binding sites for the metal ion. In the complex, copper is held through nitrogen donors from the histidine side chain, the N-terminal amine, and deprotonated amide nitrogens. The resulting compound is intensely blue and water-soluble. It occurs naturally in human plasma, saliva, and urine at low concentrations.
Published work on GHK-Cu is dominated by in vitro experiments and small animal studies. Human trials tend to be short and small, with endpoints such as skin appearance rather than clinical outcomes. Review articles often summarize the same underlying laboratory findings, which can make the evidence base look broader than it is. Several basic questions remain open: the concentration of the intact complex in human tissue, the route by which it crosses the skin barrier, and whether effects seen in culture produce measurable changes in people.
Laboratory studies describe GHK-Cu as a source of copper that cells can take up, with reported effects on collagen, elastin, and glycosaminoglycan synthesis in cultured fibroblasts. The peptide also appears in wound-repair research, where it is linked to the activity of matrix metalloproteinases and their inhibitors. These observations come largely from cell and animal models. How directly the complex controls any single pathway in intact human skin remains an open question, and reported effects depend on concentration, vehicle, and exposure time.
== Catabolism == Degradation of glycosphingolipids occurs in the lysosome, which contains digestive enzymes in animal cells. The lysosome breaks down the glycosphingolipid to its primary components, fatty acids, sphingosine, and saccharide.
Bacterial vaginosis is a condition of the vaginal microbiota in which an excessive growth of Gardnerella vaginalis and other mostly anaerobic bacteria displace the beneficial Lactobacilli species that maintain healthy vaginal microbial populations. Bacterial meningitis is a bacterial inflammation of the meninges, which are the protective membranes covering the brain and spinal cord. Bacterial pneumonia is a bacterial infection of the lungs. Urinary tract infection is predominantly caused by bacteria. Symptoms include the strong and frequent sensation or urge to urinate, pain during urination, and urine that is cloudy. The most frequent cause is Escherichia coli. Urine is typically sterile but contains a variety of salts and waste products. Bacteria can ascend into the bladder or kidney and causing cystitis and nephritis. Bacterial gastroenteritis is caused by enteric, pathogenic bacteria. These pathogenic species are usually distinct from the usually harmless bacteria of the normal gut flora. But a different strain of the same species may be pathogenic. The distinction is sometimes difficult as in the case of Escherichia. Bacterial skin infections include: Impetigo is a highly contagious bacterial skin infection commonly seen in children. It is caused by Staphylococcus aureus, and Streptococcus pyogenes. Erysipelas is an acute streptococcus bacterial infection of the deeper skin layers that spreads via with lymphatic system. Cellulitis is a diffuse inflammation of connective tissue with severe inflammation of dermal and subcutaneous layers of the skin.
Apart from its dependence of pressure and temperature, the second viscosity coefficient also depends on the process, that is to say, the second viscosity coefficient is not just a material property. Example: in the case of a sound wave with a definitive frequency that alternatively compresses and expands a fluid element, the second viscosity coefficient depends on the frequency of the wave. This dependence is called the dispersion. In some cases, the second viscosity
=== Hertha BSC === The company took a 64.7% stake in Hertha BSC of the German Bundesliga in March 2023, after its sale by Lars Windhorst, who had been majority shareholder since 2019. Due to German football's 50+1 rule, 777 does not control the club. The company faced protests from Hertha's fans. In May 2024, The Athletic reported that fans were less antagonistic toward 777 at Hertha Berlin than at other clubs in their portfolio, partly due to the controversies and low points of Windhorst's ownership.
Sources: en.wikipedia.org
Sigma-Aldrich Fine Chemicals (SAFC) is the fine chemical supply branch of Sigma-Aldrich specializing in raw materials for cell culture products; customized services for raw materials, manufacturing of active pharmaceutical ingredients. Sigma Life Science provides products such as custom DNA/RNA oligos; custom DNA and LNA probes; siRNA; isotopically-labelled peptides and peptide libraries. Sigma Advanced Genetic Engineering (SAGE) Labs was a division within Sigma-Aldrich that specializes in genetic manipulation of in vivo systems for special research and development applications. It was formed in 2008 to investigate zinc finger nuclease technology and its application for disease research models. Located in St. Louis, Missouri, SAGE Labs have developed knockout rats for the study of human diseases and disorders (such as autism), which are sold for up to US$95,000. SAGE also announced its first successful effort in creating a "knockout rabbit". Its facilities include a specific pathogen free, biosecure vivarium as well as research and development labs. SAGE Labs was acquired by Horizon Discovery Group in 2014. Carbolabs produces research quantities of chemicals produced by phosgenation reactions. The company was acquired in 1998. BioReliance provides testing and manufacturing services to pharmaceutical and biopharmaceutical companies that span the product cycle from early pre-clinical development to licensed production. The company was acquired by Sigma Aldrich in January 2012.
The head and teeth shape of bats can vary by species. In general, megabats have a fox-like appearance with long snouts and ears, hence their nickname of "flying foxes". Among microbats, longer snouts are associated with nectar-feeding, while vampire bats have reduced snouts. The number of teeth in bats can vary between 38 teeth in small, insect-eating species and as low as 20 in vampire bats. A diet of hard-shelled insects requires fewer but larger teeth along with longer canines and more robust lower jaws. In nectar-feeding bats, the canines are long, while the cheek teeth are reduced. In fruit-eating microbats, the cusps of the cheek teeth are adapted for crushing. The upper incisors of vampire bats lack enamel, which keeps them razor-sharp. The bite force of small bats is generated through mechanical advantage, allowing them to bite through the hardened armour of insects or the skin of fruit.
Vaginal cysts can mimic other structures that protrude from the vagina such as a rectocele and cystocele. Cysts that can be present include Müllerian cysts, Gartner's duct cysts, and epidermoid cysts. A vaginal cyst is most likely to develop in women between the ages of 30 and 40. It is estimated that 1 out of 200 women has a vaginal cyst. The Bartholin's cyst is of vulvar rather than vaginal origin, but it presents as a lump at the vaginal opening. It is more common in younger women and is usually without symptoms, but it can cause pain if an abscess forms, block the entrance to the vulval vestibule if large, and impede walking or cause painful sexual intercourse.
== Scaffolds == A scaffold or matrix serves as a temporary supporting structure (extracellular matrix), the initial architecture, on which the cells can grow three-dimensionally into the desired tissue. A scaffold must provide the environment needed for cellular growth and differentiation; it must provide the strength to withstand mechanical stress and guide their growth. Moreover, scaffolds should be biodegradable and degrade at the same rate as the tissue regenerates to be optimally replaced by the host tissue. There are numerous scaffolds to choose from and when choosing a scaffold biocompatibility, porosity and stability should also be held into account. Available scaffolds for oral mucosa tissue engineering are:
Interestingly, most of these mutations lead to exon skipping, and produce a shorter polypeptide, in which the Gly-Xaa-Yaa triplets stay in frame and there are no premature termination codons. Although vEDS is typically inherited in an autosomal-dominant manner, rare individuals with biallelic (homozygous or compound-heterozygous) COL3A1 variants – frequently null alleles – have an autosomal-recessive form of the disorder. The functional consequences of COL3A1 mutations can be studied in a cell culture system. A small punch biopsy of skin is obtained from the patient and used to start the culture of skin fibroblasts which express type III collagen. The type III collagen protein synthesized by these cells can be studied for its thermal stability. In other words, the collagens can be subjected to a short digestion by proteinases called trypsin and chymotrypsin at increasing temperatures. Intact type III collagen molecules, which have formed a stable triple helix, can withstand such treatment till about 41 °C, whereas molecules with mutations that lead to glycine substitutions fall apart at a much lower temperature. It is difficult to predict the clinical severity based on the type and location of COL3A1 mutations. Another important clinical implication is that several studies have reported on mosaicism. This refers to a situation where one of the parents carries the mutation in some, but not all of her or his cells, and appears phenotypically healthy, but has more than one affected offspring.
Sources: en.wikipedia.org
It is a complex of a three-amino-acid peptide, glycine, histidine and lysine, bound to a single copper(II) ion. The metal is held mainly by the histidine side chain and the peptide backbone. Most commercial material is supplied as an acetate salt rather than as the free complex.
The free peptide was reported in 1973 by Loren Pickart, who isolated it from human plasma. Its copper-binding behaviour was characterised over the following years. The metal-bound form has been the subject of most later research.
Yes. Copper tripeptide-1 is the name used in cosmetic ingredient labelling, while GHK-Cu is the shorthand found in the scientific literature. Both refer to the same peptide-copper complex, and the two terms are interchangeable in most technical documents.
Identification usually combines reverse-phase high-performance liquid chromatography with mass spectrometry. The copper content can be measured separately by inductively coupled plasma mass spectrometry or atomic absorption spectroscopy. The combination helps distinguish the intact complex from free peptide or free copper.