ION BLUE RESEARCH DIRECTORY
AHK-Cu vs GHK-Cu
GHK-Cu has more research — including small human cosmetic studies and an independent wound-healing trial — while AHK-Cu has essentially one laboratory study on hair-follicle cells. Both are copper tripeptides and neither is an approved drug; note that much of GHK-Cu’s cosmetic human data is manufacturer-linked.
Scientific comparison details to support ingredient and peptide selection.
Side by side
| AHK-Cu | GHK-Cu | |
|---|---|---|
| What it is | Copper(II) complex of the tripeptide alanine-histidine-lysine (Ala-His-Lys) | Copper(II) complex of the tripeptide glycine-histidine-lysine (Gly-His-Lys) |
| INCI name | Not confirmed in EU CosIng (vendor name "Copper Tripeptide-3" unverified) | Copper Tripeptide-1 |
| Mainly studied for | Hair-follicle cells (laboratory) | Skin remodeling and wound healing |
| Best evidence level | Preclinical — one ex vivo/in vitro study | Preclinical-to-low — reviews + one independent human wound-healing RCT; cosmetic human data largely manufacturer-linked |
| Key sources | Pyo et al. 2007 (PMID 17703734, in vitro) | Mulder 1994 (PMID 17147644, human diabetic-ulcer RCT); Maquart 1993 (PMID 8227353, animal); Siméon 2000 (PMID 11045606, cell); Pickart reviews (manufacturer-affiliated) |
| Typical use level | Vendor-dependent; no authoritative figure found | Topical cosmetic ~0.05–1% (SpecialChem supplier data) |
| What we don't know | Whether it does anything for hair or skin in living people | Independent (non-manufacturer) confirmation of cosmetic outcomes |
Comparison Type
Peptide vs Peptide
Evidence Notes
Neither peptide is an approved drug and neither has strong independent human cosmetic-outcome trials. GHK-Cu is better studied overall, but its most independent human data (Mulder 1994) concern diabetic wound healing, not cosmetics, and much of the cosmetic literature is authored by the molecule’s commercial researchers. AHK-Cu’s only cited study is a laboratory experiment on isolated hair follicles and cells.
Peptides Compared
FAQ
Which has more research, AHK-Cu or GHK-Cu?
GHK-Cu. It has multiple reviews, animal wound-healing data, a cell study, and an independent human wound-healing trial, whereas AHK-Cu has essentially one laboratory study on hair-follicle cells. Both still lack strong independent human cosmetic trials.
Is either one proven to regrow hair or rejuvenate skin in people?
No. AHK-Cu’s hair data are from a dish (ex vivo/in vitro), not people. GHK-Cu’s cosmetic human studies are small and largely manufacturer-linked, and its strongest independent human data are about diabetic wound healing, not cosmetic outcomes.
Are AHK-Cu and GHK-Cu interchangeable?
They are different peptides (alanine vs glycine in the first position) with different research bases. GHK-Cu is far more studied; AHK-Cu is marketed mainly for hair based on limited lab data.
Sources
- The effect of tripeptide-copper complex on human hair growth in vitro. Archives of Pharmacal Research. 2007.AHK-Cu: laboratory study on isolated human hair follicles (ex vivo) and dermal-papilla cells (in vitro) — not people.
- Enhanced healing of ulcers in patients with diabetes by topical treatment with glycyl-L-histidyl-L-lysine copper. Wound Repair and Regeneration. 1994.GHK-Cu: independent human randomized trial — diabetic wound healing, not cosmetic use.
- In vivo stimulation of connective tissue accumulation by the tripeptide-copper complex in rat experimental wounds. Journal of Clinical Investigation. 1993.GHK-Cu: independent animal wound-healing study.
- The tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ stimulates matrix metalloproteinase-2 expression by fibroblast cultures. Life Sciences. 2000.GHK-Cu: independent fibroblast (cell) study.
- GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. BioMed Research International. 2015. (Authored by Skin Biology researchers (manufacturer-affiliated); narrative review, not a controlled trial.)GHK-Cu: manufacturer-affiliated review summarizing small human topical studies.
About ION BLUE
ION BLUE makes one product: a serum with 0.10% pure GHK-Cu (1,000 ppm), fully disclosed. We publish these comparisons so you can judge the evidence yourself, including where it doesn’t favor us. See the serum.