Quick answer: GHK-Cu Peptide Serum and GHK-Cu 50mg share the same lead compound, copper tripeptide-1. The serum is a finished formula that pairs GHK-Cu with three supporting peptides. The 50mg product is a single-compound lyophilized (freeze-dried) powder for laboratory research. Which one you want depends on whether your work needs GHK-Cu on its own or as part of a complex.
What do the two GHK-Cu products have in common?
Both are built around GHK-Cu, also written GHK-Copper, GHK Cu, copper tripeptide-1 or glycyl-L-histidyl-L-lysine copper. It is a small tripeptide, meaning three amino acids (glycine, histidine and lysine) joined in a chain, bound to a copper ion.
Researcher Dr. Loren Pickart first isolated it in 1973. Since then it has been studied for its role in copper delivery and its interaction with the structural proteins of skin. That is the only thing the two products share. Everything else is format.
GHK-Cu Peptide Serum vs GHK-Cu 50mg side by side
| Feature | GHK-Cu Peptide Serum | GHK-Cu 50mg |
|---|---|---|
| Form | Finished, ready-made serum | Lyophilized (freeze-dried) powder |
| Peptides | Four-peptide complex led by GHK-Cu | GHK-Cu alone |
| Listed exclusions | No binders, fillers, fragrance, harsh preservatives or dyes | Not a formulated product |
| Preparation step | Product page lists no reconstitution | Requires reconstitution before laboratory work |
| Size on page | Serum format | 50mg |
| Cleanest question it can answer | How a multi-peptide formula behaves | What GHK-Cu itself does in a defined system |
What is in each product?
The GHK-Cu Peptide Serum is a USA-made copper peptide serum. GHK-Cu leads a four-peptide complex, and the formula is described as having no binders, fillers, fragrance, harsh preservatives or dyes. The product page does not name the three supporting peptides, so we do not name them here.
The GHK-Cu 50mg vial holds the one compound as a freeze-dried powder. Our article on lyophilization explains why powder is the standard shipping form.
What has published research examined about GHK-Cu?
Published work on GHK-Cu looks at collagen, elastin, glycosaminoglycans and the extracellular matrix. The extracellular matrix is the scaffold of proteins and sugars that surrounds cells in skin and other tissue. Most of this research comes from cell culture and preclinical studies. Researchers propose that the peptide acts partly by delivering copper and partly by signalling to the cells that maintain that scaffold.
That evidence base is real but limited. It is mostly early-stage laboratory work, and it was done on GHK-Cu itself, not on the four-peptide complex in the serum. We are not aware of published studies on that specific combination, and we do not cite any. For how GHK-Cu compares with another peptide in the catalog, see GHK-Cu vs BPC-157.
How do you tell them apart on a COA?
A Certificate of Analysis (COA) is the lab report for a batch. Our line-by-line COA guide covers the basics. Here is what is specific to GHK-Cu.
For the single-compound powder
- Identity by mass: the reported mass should match the copper-bound tripeptide. Free GHK without copper would read roughly 60 mass units lower, so a mass that is too low can point to missing copper.
- Purity by HPLC: this method separates the sample into components. One dominant peak is what you want to see. It does not confirm copper content on its own.
- Content per vial: the report should state the amount of peptide in the 50mg vial, not just a purity percentage.
For a multi-peptide formula
A four-peptide complex cannot be read like a single-compound report. One purity percentage would blend four different molecules. To verify such a product you would look for each peptide identified separately. Check the serum product page for the testing information available for that product.
Which format fits a research question?
If your question is about GHK-Cu alone, the single-compound powder is the cleaner choice. Any result can be attributed to one defined molecule. If you are studying a finished multi-peptide formula, the serum is the matching product. Be careful not to credit GHK-Cu for an effect that three other peptides might also contribute to. Our piece on blends versus individual compounds looks at that same attribution problem.
Frequently asked questions
Is GHK-Cu the same as GHK?
No. GHK is the three-amino-acid peptide on its own. GHK-Cu is that peptide bound to a copper ion.
What does copper tripeptide-1 mean?
It is another name for GHK-Cu. "Tripeptide" means three amino acids, and "copper" refers to the bound ion.
Does the serum contain only GHK-Cu?
No. GHK-Cu leads a four-peptide complex, with three supporting peptides alongside it. The page does not list them by name.
Can I compare results from the serum and the powder directly?
Not cleanly. The powder is one compound and the serum is a formulated complex, so differences could come from the other peptides or the formula itself.
Who discovered GHK-Cu?
Dr. Loren Pickart first isolated it in 1973. It has been studied in the decades since.
Every lot we sell has a Certificate of Analysis you can read before you order. Questions before you buy? Our team is in Chandler, Arizona: (888) 745-1505 or our contact page.
View GHK-Cu Peptide SerumAll products sold by BioPure Peptides are intended strictly for in-vitro laboratory and research use only. They are not for human or animal consumption. These statements have not been evaluated by the U.S. Food and Drug Administration, and these products are not intended to diagnose, treat, cure, or prevent any disease.