Many people encounter GHK through skincare marketing long before they see any research behind it. Here is what the available trial data actually covers, without the hype.
What GHK is
GHK is a small naturally occurring peptide made up of three amino acids: glycine, histidine, and lysine. Its molecular formula is C14H24N6O4, with a molecular weight of about 340.4 daltons. GHK is often studied bound to copper, forming the complex commonly written as GHK-Cu, particularly in topical wound and skin research. No FDA-approved drug label exists for GHK itself, so there is no approved indication, dosing standard, or officially recognized brand name to reference here.
What the evidence shows
Five trials referencing GHK are registered. One completed Phase 4 study examined facial skin quality, hydration, and skin barrier outcomes after a series of hydrafacial treatments. A separate Phase 2 trial, currently recruiting, is evaluating a topical GHK-Cu gel for acute skin wound healing. These studies illustrate the current research focus on topical skin and wound applications rather than establishing any confirmed clinical benefit.
What this means for readers
Because GHK has no approved drug label, there is no official mechanism of action, indication, or safety labeling to summarize from regulatory sources. Reported adverse event data was not available for this compound at the time of review. Anyone encountering GHK products should understand that registered research is limited and still ongoing, particularly for the wound healing application.