A to Z / Cosmetic / skin
Copper Peptide Hair Complex
Also known as GHK-Cu hair formulations, copper tripeptide scalp complex.
Best known for Copper peptides formulated for hair loss
Evidence★★☆☆☆
Safety dataPoorly characterised
Route Topical (scalp)
United StatesCosmetic ingredient: lawfully sold
AustraliaCosmetic ingredient: lawfully sold
as at 16 September 2026
What it is and what it does
This entry covers scalp products combining copper tripeptides (usually GHK-Cu, AHK-Cu or both). They are lawful cosmetic products with limited human data so far, commonly used for hair thinning, density and post-transplant recovery.
What the full entry covers
The book carries the rest of this entry:
- Where the research stands, with every claim cited
- What people commonly ask, and what the research shows so far
- Dosing in four labelled bands, described and not recommended
- Side effects, serious risks, cautions and interactions
- Questions to discuss with your doctor
- How it compares with GHK-Cu, AHK-Cu, Zinc Thymulin
Related entries
A certificate of analysis tells you what is in a vial. The evidence rating above tells you whether the compound has been shown to work in humans. Neither answers the other's question. How to read a certificate of analysis.
This page describes what is known and not known about Copper Peptide Hair Complex. It is not medical advice and not a recommendation to use it.