Claimed effect · GHK-Cu

Does GHK-Cu help with hair growth?

D
Grade D — no human evidenceNone controlled · effect size: not measurable
Short answerNo human evidence. As of 2 September 2026, only none controlled exist for GHK-Cu for hair growth. Claims rest on cell and animal work and on analogy with minoxidil; no human trial.

What the studies show

Claims rest on cell and animal work and on analogy with minoxidil; no human trial.

Animal studies, cell studies, or anecdotes only. This is where almost every viral peptide sits. Promising and proven are different words for a reason.

In context

GHK-Cu is a naturally occurring three-amino-acid peptide that binds copper, found in plasma, saliva and urine, with levels that fall with age. Applied to skin in creams it has modest evidence from small trials for improving fine lines and skin firmness, which is why it is a common cosmetic ingredient. Injected use — increasingly promoted online — has no human evidence of any kind.

GHK-Cu is cosmetic ingredient. Legal status differs by country — see the regulation section or the jurisdiction pages.

Questions

Is GHK-Cu proven to help with hair growth?
No. There is no human evidence for it (None controlled); the claim rests on animal or cell studies and LYO grades it D.
What studies are behind the grade?
Claims rest on cell and animal work and on analogy with minoxidil; no human trial.
Is GHK-Cu approved for this?
No. GHK-Cu is cosmetic ingredient; it is not an approved medicine for any indication in the jurisdictions LYO covers.

Other outcomes for GHK-Cu

Reviewed 2 September 2026. Grades count human evidence only; see how LYO grades. Not medical advice. Correct this page →