Ingredient pairing
Can you mix GHK-Cu and Vitamin C (LAA)?
Use with careUse these with care.
Low-pH acids and pure vitamin C can destabilize copper peptides, so side by side they may simply do less.
Do this: Keep the copper peptides in a separate routine, morning or evening.
Routine: Best kept in separate routines, morning and evening.
Skip if: very sensitive, rosacea
Ask your doctor in pregnancyWhich one goes first?
Best kept apart
Rather than layering them, keep GHK-Cu and Vitamin C (LAA) in separate routines or on separate days.
How to introduce GHK-Cu and Vitamin C (LAA)
- Patch test each one first: a coin-sized amount on your inner forearm for two or three days, watching for redness or stinging.
- Keep them on separate days rather than together, so they are not both working on your skin at once.
- Start the vitamin C at once or twice a week and increase gradually, giving your skin time to settle between steps.
- If skin turns tight, flaky, red or starts to sting, drop back a step and let your barrier recover for a few days before pushing on again.
There is room for both here, as long as you build up gently and let your skin set the pace.
For your skin type Sensitive skin should ease in gently: Vitamin C (LAA) can be mildly irritating on its own, and more so alongside another active.
Choosing between them instead? GHK-Cu vs Vitamin C (LAA) →
Also worth checking
More pairings with GHK-Cu
More pairings with Vitamin C (LAA)
GHK-Cu and Vitamin C (LAA), answered
Can you mix GHK-Cu and Vitamin C (LAA)?
Use these with care. Low-pH acids and pure vitamin C can destabilize copper peptides, so side by side they may simply do less. Keep the copper peptides in a separate routine, morning or evening.
Should you use GHK-Cu and Vitamin C (LAA) in the morning or at night?
Keep them in separate routines or on separate days rather than at the same time.
How should you introduce GHK-Cu and Vitamin C (LAA)?
Patch test each one first: a coin-sized amount on your inner forearm for two or three days, watching for redness or stinging. Keep them on separate days rather than together, so they are not both working on your skin at once. Start the vitamin C at once or twice a week and increase gradually, giving your skin time to settle between steps. If skin turns tight, flaky, red or starts to sting, drop back a step and let your barrier recover for a few days before pushing on again. There is room for both here, as long as you build up gently and let your skin set the pace.
What else should you not mix with GHK-Cu?
Nothing else clashes badly with GHK-Cu. It fits into most routines, though it is always wise to introduce one new product at a time.
Sources
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General guidance, not medical advice. When in doubt, introduce one product at a time.