GHK-Cu Dosage: Follow the Route, Not the Reputation
Three registry records, opened in order, and what each one turns out to be.
GHK-Cu has a real literature. Around 180 records on PubMed, a well described mechanism involving copper binding and tissue remodelling, and decades of interest. The question this page follows is narrower: what was the compound actually given to, and how.
Record one: a facial treatment
NCT05932732 is a completed Phase 4 study with 27 participants, run by the Austin Institute for Clinical Research. It assesses facial skin quality, hydration and skin barrier across three HydraFacial treatments.
GHK-Cu features as a component of a cosmetic procedure. The study is about the procedure.
Record two: a patch
NCT07706361 is listed as not yet recruiting, 100 participants, sponsored by LifeWave. It examines the effect of that company's X39 patch on circulating GHK and GHK-Cu levels.
A manufacturer measuring what its own product does to a biomarker is a reasonable study to run. It is not a trial of an injected peptide, and the sponsor has an obvious interest in the direction of the result.
Record three: not citable
The third entry is filed by a sponsor whose registry records do not survive basic checking, and nothing on this site cites it. Worth knowing it exists, because a search returns it alongside the other two and the count of three is otherwise misleading.
What the sequence shows
Two legitimate studies, neither administering the compound the way it is sold, and a third that should be set aside. No approved product anywhere.
So a ghk cu dosage figure for injection has no registered study and no label behind it. What can be sourced honestly is what topical and cosmetic work used, in what preparation, and on what tissue.
Why route deserves the same scepticism as species
The familiar warning in this field is that rodent figures per kilogram do not convert to people. The less familiar one is that a route change is its own extrapolation. A copper complex delivered to the skin surface and the same complex injected are different exposures with different distribution, and a chart that moves between them without saying so has made an argument while appearing to report a number.