GHK-Cu: what the research shows
A copper-carrying peptide found in skin care for its anti-aging effects.
Also known as Copper peptide
At a glance
Used in many skin creams and serums as a cosmetic ingredient. Not approved as a medicine; injected use is unregulated.
What is GHK-Cu?
GHK is a tiny peptide made of three amino acids (glycine, histidine and lysine) that occurs naturally in blood and saliva. It grabs copper, and this copper-bound form is called GHK-Cu. Levels in the body fall as we age.
How does GHK-Cu work?
In lab studies it encourages skin cells to make collagen and other “scaffolding” proteins, and it affects many genes involved in repair.
What does the research show?
- Lab studies and small cosmetic trials suggest creams with GHK-Cu can improve skin firmness and fine lines.
- Much of the evidence comes from lab work and small studies, so the size of the benefit is uncertain.
Known risks and side effects
- Skin products are generally well tolerated, though some people get irritation.
- Injected GHK-Cu hasn’t been properly studied in people.
Is GHK-Cu approved?
Mostly studied in cells and animals, with little or no proper testing in people.
Used in many skin creams and serums as a cosmetic ingredient. Not approved as a medicine; injected use is unregulated.
From the community
Watch: GHK-Cu and related science
Start with the compound discussion, then use the background lesson to understand its biology. Each card explains its connection. Recordings may predate later findings or regulatory changes.
Dr. Aleksandra Brown
Dermatologist rates copper peptide serums
What copper peptides (GHK-Cu) can and can’t do in skin care.
Aleksandra Brown, DO, FAAD, dermatologist
Discusses the compound
Discusses GHK-Cu or its clinical context. Read the original studies linked here for the exact formulation, population and outcomes.
National Institute of Mental Health
What is clinical research?
Why studies in people are needed and what clinical research is designed to establish.
NIMH · US National Institutes of Health
Research skills
Helps you judge the study design or uncertainty in GHK-Cu research; it is not a trial of the compound.
Sources and references
- Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene DataPickart & Margolina · International Journal of Molecular Sciences · 2018
- Topically applied GHK as an anti-wrinkle peptide: advantages, problems and prospectiveMortazavi et al. · BioImpacts · 2025
VETUD Learn explains published research in plain language. It is general information, not medical advice. Talk to a doctor before starting, stopping or changing any treatment.
In the research shop
Check the catalog for related laboratory research materials. These products are separate from the approved medicines and clinical trial formulations discussed here.
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