Copper Peptides (GHK-Cu)
A copper-bound tripeptide for healing, collagen and recovery — gentle, but fussy about what you layer it with
INCICopper Tripeptide-1
- Category
- Peptide
- Risk level
- low
- Wound-healing origin
- GHK-Cu was first identified as a factor in human plasma that helps wounds heal — and its levels fall with age
- Dual action
- Supports collagen and elastin synthesis while also acting as an antioxidant
- Layering matters
- Don't use in the same step as vitamin C or strong acids/retinoids — they can destabilise each other
- Common concentration
- 1–3% in anti-aging serums; higher in professional treatments
Look for these names on ingredient lists
This ingredient may appear under any of these names:
Commonly found in
Possible reactions
- Contact dermatitis is rare
- No sun sensitivity
- The turquoise colour can temporarily stain light fabrics
- Generally considered acceptable topically in pregnancy (limited evidence)
Top picks with Copper Peptides (GHK-Cu)
Highly rated products that feature Copper Peptides (GHK-Cu) in their ingredient list.
Always scan the actual label before use — formulations change.
What is GHK-Cu?
Copper peptides — specifically GHK-Cu (Glycyl-L-Histidyl-L-Lysine copper complex) — are a naturally occurring tripeptide bound to a copper ion. GHK was discovered in the 1970s in human plasma, where levels decline with age. It plays roles in wound healing, tissue repair and collagen synthesis, and topical GHK-Cu has been shown to support collagen production, skin elasticity and the healing of damaged skin.
The copper binding is the point: free copper is pro-oxidant and irritating, whereas GHK-Cu delivers copper in a controlled, bioavailable form that enables the peptide's regenerative signalling. It's also instantly recognisable by its striking turquoise-blue colour.
Why it's well tolerated — with layering caveats
Copper peptides have a strong safety profile at cosmetic concentrations; contact dermatitis is rare, and there's no exfoliation, peeling or sun sensitivity. The nuances are about compatibility, not safety:
- Not with vitamin C in the same step — vitamin C competes for the copper and can destabilise the peptide. Separate by time of day (vitamin C AM, copper peptides PM) or ~30 minutes.
- Not in the same layer as strong acids or retinoids — can reduce the effectiveness of both; alternate instead.
- Turquoise staining — can faintly tint a light pillowcase; harmless and washable.
- Pregnancy — topical use is generally considered acceptable, though evidence is limited.
Copper peptides are a good reminder that "is it safe?" and "does it play nicely?" are different questions. This one is very safe — its real-world failures are usually people layering it straight over vitamin C and quietly cancelling both out. If you remember one thing, make it separate it from your vitamin C. — Snehal
How to use them well
- Use at night, away from vitamin C.
- Apply to clean, dry skin for best absorption.
- Seal with hyaluronic acid and moisturiser.
- Give it 8–12 weeks — regenerative effects are gradual.
- Don't mix in the same step as acids/retinoids — alternate nights or times.
Safer / simpler alternatives
- For collagen support without layering rules: Matrixyl.
- For antioxidant action: vitamin C or vitamin E.
- For pregnancy: Matrixyl and Argireline are similarly gentle.
- For stronger wrinkle reduction: retinol or retinaldehyde.
The bottom line
Copper peptides (GHK-Cu) are a gentle, well-tolerated peptide best known for healing and recovery, with genuine collagen support. The catch isn't a reaction — it's compatibility: keep them away from vitamin C and strong acids in the same step, give them a couple of months, and they're a solid regenerative addition to a routine.
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