> ## Site index > Full index of Peptides.build at https://peptides.build/llms.txt. Use it to discover every page. # What Is GHK-Cu? Copper Peptide Explained GHK-Cu explained: the copper-binding tripeptide, why it is blue, what topical and injectable research covers, how it is prescribed, and its FDA status. URL: https://peptides.build/learn/what-is-ghk-cu/ Guide · Cellular Health # What is GHK-Cu? Published October 12, 2026 · Educational, not medical advice ## Short answer GHK-Cu is a naturally occurring tripeptide, glycyl-L-histidyl-L-lysine, that binds copper. It was first isolated from human plasma in the 1970s, and its plasma level declines with age. Published reviews cover tissue remodeling and skin regeneration research, with most human data coming from topical cosmetic studies; the injectable rests on in vitro and animal work. In the US it is prescribed only as a compounded medication, and compounded medications are not FDA-approved. - [Where does GHK-Cu come from?](#origin) - [What has GHK-Cu been studied for?](#research) - [How is GHK-Cu prescribed?](#prescribed) - [Is GHK-Cu FDA-approved or allowed in sport?](#status) - [How are GHK-Cu doses measured?](#units) - [FAQ](#faq) - [References](#references)
GHK-Cu quick facts
TypeTripeptide (3 amino acids) complexed with a copper(II) ion
OriginNaturally occurring; first isolated from human plasma in the 1970s
Also known asCopper peptide GHK-Cu, copper tripeptide-1, glycyl-L-histidyl-L-lysine copper
Evidence to dateIn vitro and animal studies for the injectable; human data is mostly topical cosmetic studies
Form in this catalogSubcutaneous injection, supplied already reconstituted; the solution is blue
Regulatory statusCompounded medication; not FDA-approved for any use
Anti-dopingNot named on the WADA Prohibited List; the S0 category can cover non-approved substances
Evidence snapshot**What kind of research is cited for GHK-Cu?**3 cited sources: 3 review articles. Counts describe study type, not strength of result. Sources cited for GHK-Cu, by study type | Study type | Sources | | --- | --- | | Human clinical trials | 0 | | Other human studies | 0 | | Animal and lab studies | 0 | | Review articles | 3 | ## Where does GHK-Cu come from? GHK-Cu is the copper complex of a peptide made of three amino acids, glycine, histidine and lysine, written in full as glycyl-L-histidyl-L-lysine and abbreviated GHK. Unlike most peptides in this catalog it is not a laboratory invention: GHK was first isolated from human plasma in the 1970s, and its concentration in plasma is reported to decline with age. That origin is why it is often described as a naturally occurring peptide, even though the version a pharmacy dispenses is assembled synthetically. GHK binds a copper(II) ion, and the resulting complex is what the name GHK-Cu refers to. The copper is also the reason a vial of GHK-Cu is blue: the colour belongs to the copper complex itself and does not come from a dye or an additive. As prescribed, nothing is extracted from plasma. A compounding pharmacy assembles the three-residue sequence and supplies it as the copper complex. ## What has GHK-Cu been studied for? GHK-Cu has one of the larger literatures among the peptides in this catalog, but the shape of that literature matters more than its size. The two reviews cited below cover tissue remodeling and skin regeneration research. One, from 2018, revisits the peptide in light of gene-expression data from cultured cells; the other, from 2015, surveys skin regeneration research, where the human studies are largely cosmetic and topical. GHK-Cu applied to the skin and GHK-Cu given by injection are two different evidence bases, and they should be kept apart. The human data in those reviews comes mostly from creams and serums tested on skin. The injectable form prescribed here rests on in vitro work in cell culture and on animal models. No controlled human trial of injectable GHK-Cu appears in the studies this site cites, and a page that carries a topical cosmetic finding across to an injection is mixing two kinds of evidence. What the published research covers | Area | Type of evidence | What the reviews describe | | --- | --- | --- | | Skin, applied topically | Human cosmetic studies, summarized in reviews | The bulk of the human data; a different route from injection | | Tissue remodeling | In vitro and animal studies | Pathways involved in connective-tissue remodeling and repair | | Gene expression | Cell-culture data, summarized in a 2018 review | The peptide's interaction with the activity of genes in cultured cells | | Injectable form | In vitro and animal studies only | No controlled human trials in the cited pool | Prescribed, pre-mixed ## Get GHK-Cu prescribed, pre-mixed US-supervised · all 50 states [GHK-Cu](https://peptides.build/protocols/ghk-cu/)Not named in the HHS policy **$158**/mo*$949 billed every 6 months* Pay over time at checkout![Klarna](/media/payments/klarna.png)![Afterpay](/media/payments/afterpay.png)![Affirm](/media/payments/affirm.png) Prescription required. Your provider decides if it is appropriate. Compounded medications are not FDA-approved. US-supervised · all 50 states [GLOW Peptide Stack](https://peptides.build/protocols/glow-stack/)Blend: outside the HHS policy **$183**/mo*$1,099 billed every 6 months* Pay over time at checkout![Klarna](/media/payments/klarna.png)![Afterpay](/media/payments/afterpay.png)![Affirm](/media/payments/affirm.png) Prescription required. Your provider decides if it is appropriate. Compounded medications are not FDA-approved. ## How is GHK-Cu prescribed? GHK-Cu is prescribed in the US as a compounded medication: a licensed provider writes a prescription for an individual patient after an online intake, and a licensed 503A pharmacy prepares it. Through Peptides.build the injectable form ships already reconstituted, as a blue solution with the concentration printed in mg/mL on the pharmacy label, so patients do not handle powder or add water. GHK-Cu is also one of the compounds in the Glow Stack, a blend of BPC-157, GHK-Cu and TB-500, and in the KLOW Stack, which adds KPV to those three. In both blends it is the skin and connective-tissue component, sitting alongside two compounds whose research centers on soft-tissue repair in animal models. Whether GHK-Cu on its own or a blend is appropriate is decided by the provider at intake. The dose and the schedule are set by the provider and are not published on this site. ## Is GHK-Cu FDA-approved or allowed in sport? GHK-Cu is not FDA-approved for any use. The injectable prescribed here is a compounded medication, and compounded medications are not FDA-approved: they are prepared for one patient on prescription rather than reviewed and approved the way mass-manufactured drugs are. Copper peptides sold in skincare are regulated as cosmetics, a separate category that says nothing about an injectable prescription. GHK-Cu is not named on the World Anti-Doping Agency Prohibited List. That is not the same as being cleared: the list's S0 category can cover non-approved substances, meaning compounds with no current approval for human therapeutic use, so drug-tested athletes should check with their governing body before using it. ## How are GHK-Cu doses measured? GHK-Cu prescriptions are written in milligrams, unlike BPC-157, whose prescriptions are written in micrograms, and the volume drawn depends on the concentration of the vial. A pre-mixed pharmacy vial prints that concentration in mg/mL on the label; a powder vial gets its concentration from the amount of water added. The free GHK-Cu calculator on this site converts a prescribed dose and a label strength into units on a U-100 insulin syringe. It performs arithmetic only and does not recommend a dose. The blue colour makes the liquid easy to see in the syringe, but colour is not a measure of strength; the label is. Prescription, not research grade ## Prescribed GHK-Cu vs research peptides: what is different? Prescribed GHK-Cu is not a research chemical. It is a prescription medication: a licensed US provider reviews your intake first, and a licensed 503A pharmacy compounds it for you by name. Vials sold online as “research use only” skip both steps. What you pay for here is that review, a pharmacy you can name, and a label that says what is in the vial. A research seller’s certificate of analysis is a document the seller controls: it chooses the lab and the sample, and a PDF can be reused, edited or re-dated. No regulator checks it. Prescribed GHK-Cu compared with research-use-only peptides | Point | Prescribed through Peptides.build | Research use only | | --- | --- | --- | | Access | Online intake reviewed by a licensed US provider; prescribed only when appropriate. | No prescription and no clinical review of whether it suits you. | | How it's labeled | A prescription medication compounded for you by name. | Commonly sold labeled “research use only, not for human consumption.” | | Who prepares it | A licensed 503A US compounding pharmacy under state and federal oversight. | Unregulated suppliers, often with no verifiable chain of custody. | | Testing | Third-party tested. | Certificates of analysis are self-reported when provided at all. | | Purity and identity | Prepared to a prescription for a specific patient. | Purity, strength, and even identity are unverified by any independent party. | This compares two care models, not two products. Compounded medications are not FDA-approved, and we do not claim otherwise. What a prescription adds is a licensed provider deciding whether a protocol is appropriate for you and a licensed pharmacy preparing it. [Read the full guide to research vs prescription peptides](https://peptides.build/learn/research-peptides-vs-prescription-peptides/). Common questions ## GHK-Cu FAQ ### Why is GHK-Cu blue? GHK-Cu is blue because of the copper(II) ion bound to the peptide. The colour belongs to the copper complex itself, not to a dye, so a reconstituted vial is expected to look blue. Colour does not indicate strength; the concentration is printed on the pharmacy label. ### Is injectable GHK-Cu the same as a copper peptide cream? The peptide is the same, but the route and the evidence differ. The human data in published reviews comes largely from topical cosmetic studies, while the injectable form rests on in vitro and animal research. This catalog prescribes the injectable form, which only a licensed provider can order. ### Has GHK-Cu been tested in humans? Mostly in topical cosmetic studies, which the published reviews summarize. There are no controlled human trials of injectable GHK-Cu in the studies this site cites, which a prescribing provider will discuss with you. ### Is GHK-Cu FDA-approved? No. GHK-Cu is not FDA-approved for any use. In the US the injectable reaches patients only as a compounded medication prescribed by a licensed provider and prepared by a licensed 503A pharmacy, and compounded medications are not FDA-approved. ### Is GHK-Cu banned in sport? GHK-Cu is not named on the WADA Prohibited List. The list's S0 category can cover non-approved substances, so the absence of a name is not a clearance, and drug-tested athletes should check with their governing body. ### What is the difference between GHK-Cu and the Glow Stack? The Glow Stack is a blend of BPC-157, GHK-Cu and TB-500; the KLOW Stack adds KPV. GHK-Cu on its own is a single copper peptide. Whether one compound or a blend fits is a decision the provider makes during intake. Prescribed, not mixed at home ## GHK-Cu through Peptides.build A licensed US provider reviews a short online intake and decides whether a protocol is appropriate. A US 503A pharmacy prepares it already reconstituted, labels the concentration and ships it cold-chain. Dosing is set by the provider and is not published on this site. - [GHK-Cu protocol: pricing, who it is for, FAQ](https://peptides.build/protocols/ghk-cu/) - [Glow Stack protocol: pricing, who it is for, FAQ](https://peptides.build/protocols/glow-stack/) - [KLOW Stack protocol: pricing, who it is for, FAQ](https://peptides.build/protocols/klow-stack/) - [All cellular health protocols compared](https://peptides.build/protocols/cellular-health/) - [GHK-Cu Calculator: units, reconstitution and dosing chart](https://peptides.build/tools/ghk-cu-calculator/) - [What is the Glow Stack?](https://peptides.build/learn/what-is-the-glow-stack/) - [What is the KLOW Stack?](https://peptides.build/learn/what-is-the-klow-stack/) - [What is Epitalon?](https://peptides.build/learn/what-is-epitalon/) Sources ## References 1. Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data. *International Journal of Molecular Sciences*, 2018. [doi:10.3390/ijms19071987](https://doi.org/10.3390/ijms19071987)Study type: Review 2. GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. *BioMed Research International*, 2015. [doi:10.1155/2015/648108](https://doi.org/10.1155/2015/648108)Study type: Review 3. Stable Gastric Pentadecapeptide BPC 157 and Wound Healing. *Frontiers in Pharmacology*, 2021. [doi:10.3389/fphar.2021.627533](https://doi.org/10.3389/fphar.2021.627533)Study type: Review Citations are listed with their study type so the evidence can be weighed. Review articles summarize other studies; animal and in vitro findings do not describe outcomes in people. This article is educational and is not medical advice. GHK-Cu is not FDA-approved for any use, and compounded medications are not FDA-approved. No results are implied or guaranteed. Talk to a licensed provider about your own history before starting any protocol.