Comparison
GHK-Cu vs AHK-Cu
Two copper peptides sold for different tissue. Both carry copper, and that is why running them together is a question, not a default.
GHK-Cu is the better-known of the two and the one with a real body of topical human work, mostly on skin. AHK-Cu is marketed chiefly for hair, and its evidence is thinner by a wide margin.
What they share is the part people skip past. Both are copper-carrying peptides, so running both delivers copper twice over. Copper is an essential trace element with a real upper limit, so this is a different question from combining two unrelated peptides.
The routes are also where the evidence sits. Both compounds' human support is topical; injecting either is a different proposition from the studies usually cited for them.
| Attribute | GHK-Cu | AHK-Cu |
|---|---|---|
| Marketed for | Skin, wound healing | Hair |
| Evidence level | Preclinical | Preclinical |
| Strongest human data | Topical, cosmetic endpoints | Very limited |
| Delivers copper | Yes | Yes |
| Common routes described | Topical, subcutaneous | Topical, subcutaneous |
Things worth knowing
- Running both means two copper sources. That is a genuine interaction, and there are not many of those in this category. Most of what gets called one is an absence of data wearing a warning label.
- Human evidence for either is topical. A compound with support by one route does not carry that support to another.
- Both turn up in blends, where the ratio is fixed and the copper load is whatever the filler decided it should be.
Full profile
GHK-Cu
A naturally occurring copper-binding tripeptide with a long history in topical skincare research. Injected use is not what the research studied.
Full profile
AHK-Cu
GHK-Cu's less-studied sibling, used topically for hair. Almost all the research people cite for it is actually GHK-Cu research.
This page is educational. It describes what published research reports, not what you should do. Peptides discussed here are largely not approved for human use, and nothing on Bioalmanac is medical advice.