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GHK-Cu vs AHK-Cu
The burned-in captions and transcript carry the scientific claims and their limitations. The visuals are conceptual illustrations, not validated molecular models or experimental images. The video has no voice or audio. The full explanation is visible on screen; optional accessible captions are available in the player.
Read every result in its study context. A cell experiment, animal model, exploratory analysis and controlled human trial answer different questions.
Prepared 05 November 2026. Regulatory status is jurisdiction- and date-specific. No claim of specialist review or exhaustive evidence coverage.
Transcript
GHK-Cu ≠ AHK-Cu
One letter changes, and the evidence changes with it. GHK-Cu and AHK-Cu are related copper-binding peptides, not interchangeable treatments. [1] [2]
GHK-Cu | CELL CULTURE
GHK-Cu has laboratory work on collagen production in fibroblasts, cells involved in connective tissue. That finding is a starting point for skin research. [1]
AHK-Cu | EX VIVO + CELLS
A frequently cited AHK-Cu study tested isolated human hair follicles and cultured follicle cells. Hair growth outside the body is not a clinical trial for hair loss. [2]
Compare molecule • route • outcome
Neither study shows which peptide is better in people. Formulation and delivery matter, and topical cosmetic evidence cannot be carried over to injections. Compare the actual study, not the similarity of the names. [1] [2] [3] [4]
Sources and context
These linked sources support the evidence distinctions in this short overview. This is not a systematic review, endorsement or treatment recommendation.
- Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex GHK-Cu →Primary cell-culture study
- The effect of tripeptide-copper complex on human hair growth in vitro →Primary ex vivo human hair-follicle and cultured dermal-papilla-cell study
- FDA: Certain bulk drug substances that may present significant safety risks →US regulator; route-specific safety assessment, not a universal ban or approval list
- FDA: Cosmetics and U.S. Law →US regulator; cosmetic versus drug framework
