Can you use Copper peptides (GHK-Cu) with Niacinamide?

Q: Can you use Copper peptides (GHK-Cu) with Niacinamide?

Compatible. Generally considered a comfortable pairing in cosmetic routines; niacinamide layers well under or over copper peptides.

CompatibleEvidence · Commonly advised

Generally considered a comfortable pairing in cosmetic routines; niacinamide layers well under or over copper peptides.

Commonly advised: Frequently recommended by formulators; direct evidence can be limited.

Copper peptides (GHK-Cu)

INCI · Copper Tripeptide-1

A copper-bound tripeptide used in serums for the look of firmness and a more even tone.

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Niacinamide

INCI · Niacinamide

A vitamin-B3 active used for the look of even tone and a comfortable feel.

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Cosmetic layering guidance for the look and feel of your routine — not medical advice. Patch-test new combinations.

This site provides neutral scientific reference and sells only products lawful in your region. Nothing here is medical advice, a recommendation, or an offer to supply unapproved medicines. No dosing or administration is published for research compounds. Cosmetic peptides per Regulation (EC) 1223/2009. Unapproved injectable peptides are neither sold nor advertised in the EU (Directive 2001/83/EC, Title VIII). © 2026 Vallydia SL — Registered in Spain.