Copper Peptides (GHK-Cu)

Copper Peptides (GHK-Cu) — a naturally occurring complex of the tripeptide GHK bound to a copper ion, studied for its role in skin repair and renewal. It is one of the most researched peptides, associated with collagen support and antioxidant activity. In skincare it is used in products targeting firmness, texture, and overall skin quality.

Key points

• GHK-Cu combines the peptide glycyl-L-histidyl-L-lysine with copper, a trace mineral involved in skin structure.
• Research links it to collagen and elastin support, wound-healing processes, and antioxidant defense.
• It is typically used in serums and treatments aimed at improving firmness and skin texture over time.
• Some formulators avoid combining it with strong acids or high-dose vitamin C, which may affect its stability.

Frequently asked

Can you use copper peptides with vitamin C?

Many formulators suggest applying them at separate times, since combining copper peptides with high concentrations of vitamin C may reduce the stability or efficacy of both.

Are copper peptides safe for daily use?

They are generally well tolerated for regular use, but as with any active a patch test is wise and you should follow the specific product's directions.

Related topics

• Vitamin C in Skincare
• Retinol: The Complete Guide
• Signal Peptides
• Peptides in Skincare
• Enzyme-Inhibitor Peptides
• Copper Peptides vs Retinol
• Copper Peptides + Vitamin C (Why to Separate)
• Copper Peptides + Retinol

This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.