GHK-Cu

Not enough proof

A small peptide joined with copper. It shows up in skin products. Shots of it are not approved.

Pending medical review Updated October 16, 2026

What is it?

GHK-Cu is a tiny peptide joined to copper. "Cu" is the science sign for copper. It is often found in skin creams.

Why do people use it?

People hope it helps skin look younger or helps hair. These are claims. They are not proven facts.

Does it really work?

For shots (injections), the FDA says there is only a little data in people about safety.

Is it safe? Side effects

  • The FDA says shots of GHK-Cu could clump together. Clumps may make your body fight it like a germ.
  • Products may have unwanted bits left over from how they were made.
  • The FDA says there is only a little safety data in people.

Talk to your doctor

Do not start any peptide on your own. Ask a doctor first. We never share doses or tell you where to buy. Print our doctor questions sheet.

Check any peptide in 1 secondFree FDA Status Checker: approved, being tested, or not proven.

FAQ

What is GHK-Cu?

GHK-Cu is a tiny peptide joined to copper. "Cu" is the science sign for copper. It is often found in skin creams.

Does GHK-Cu work?

For shots (injections), the FDA says there is only a little data in people about safety.

Is GHK-Cu legal in the US?

Shots of GHK-Cu are not FDA-approved. (The FDA is the US agency that checks if medicines are safe and work.) The FDA put GHK-Cu shots on a list of things that may be risky when a pharmacy mixes them into a medicine. This FDA list is about shots, not skin creams.

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Sources

Not medical advice. Medical disclaimer.