# GHK-Cu Face Serum

> Water-based copper tripeptide-1 serum — 1% or 3% GHK-Cu, 30 mL bottle

All products are sold strictly for laboratory research use only. Not for human or veterinary use.

- Web page: https://peptidemedixeu.com/en/products/ghk-cu-serum/
- Brand: Peptide Medix EU
- Category: [Copper Peptides (GHK-Cu)](https://peptidemedixeu.com/en/collections/copper-peptides/)
- from €68 (EUR)

## Sizes and prices (EUR)

| Size | Price | SKU |
| --- | --- | --- |
| 30 mL · 1-pack | €68 | GHK-CU-SERUM-30-ML-1-GHK-CU |
| 30 mL · 3-pack | €110 | GHK-CU-SERUM-30-ML-3-GHK-CU |

_Catalog prices at build time; the web page and checkout are authoritative._

## Specifications

- **Form:** Clear blue aqueous serum in a 30 mL bottle
- **Available strengths:** 30 mL · 1% GHK-Cu (10 mg/mL); 30 mL · 3% GHK-Cu (30 mg/mL)
- **Active:** GHK-Cu, copper(II) complex of glycyl-L-histidyl-L-lysine
- **INCI name of active:** Copper Tripeptide-1
- **Peptide sequence:** Gly-His-Lys, coordinated to Cu(II)
- **CAS number (active):** 89030-95-5
- **Molecular formula (active):** C14H24N6O4·Cu
- **Molecular weight (active):** 403.93 g/mol
- **Peptide purity input:** ≥99% by HPLC; lot-matched COA available
- **Vehicle:** Aqueous, low-viscosity, no added fragrance or colourant
- **Research areas:** Fibroblast and ECM studies, copper-peptide chemistry, permeation and vehicle work
- **Storage:** 2–8 °C preferred, protected from light; keep the closure tight
- **Compatibility note:** Strong reducing agents such as ascorbic acid can disturb copper coordination

## Description

A light, water-based serum built on GHK-Cu: copper(II) held by the tripeptide glycyl-L-histidyl-L-lysine. Scientists first described GHK in human plasma in the early 1970s, recognising it as a stretch matching part of the albumin sequence; its strong pull on copper is what turns the complex a deep blue and what makes it so interesting to researchers. Reports that circulating GHK declines with age help explain why skin and matrix biologists have investigated it so extensively.

An independent laboratory confirms ≥99% HPLC purity for the peptide inputs, and each lot comes with its own certificate of analysis. Made and dispatched from our EU warehouse, strictly for laboratory research.

## Frequently asked questions

### What does the serum contain?

Its sole active is GHK-Cu — glycyl-histidyl-lysine complexed with copper(II) — in a light aqueous base without fragrance or colourant. Two strengths share the same vehicle in a 30 mL bottle: 1% (10 mg/mL) and 3% (30 mg/mL).

### Has the peptide in the serum been tested, and is there a COA?

Yes. Our GHK-Cu raw material only goes into production once it meets a ≥99% HPLC specification and its identity has been verified by mass spectrometry; ask us for that lot's certificate whenever you need it. Each bottle's own lot number links your notebook entries to it.

### What makes the serum blue?

Copper(II) bound to the tripeptide. When the complex is intact the colour is a deep blue, which gives a fast visual check. A greenish drift or fading points to disruption by reducing agents, rival chelators or an unsuitable pH.

### How do I store it?

Preferably refrigerated (2–8 °C), cap screwed tight, out of the light. Don't dip used applicators into the bottle, and note the opening date next to the lot number so your records remain traceable.

### Serum or lyophilised powder — which should I use?

Powder lets you design your own vehicle at any concentration; the serum is a finished aqueous formulation at two set strengths. Groups studying formulations or skin models tend to choose the serum, whereas those characterising the complex itself usually begin with powder.

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All products offered on this website are intended solely for in-vitro laboratory research and development by qualified professionals. They are not drugs, foods, cosmetics or dietary supplements, and are not intended to diagnose, treat, cure or prevent any disease. Products must not be introduced into humans or animals in any manner. By purchasing, you confirm that you are a qualified researcher and accept full responsibility for handling and storage in accordance with applicable laws.

Peptide Medix EU · https://peptidemedixeu.com/en/products/ghk-cu-serum/