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What order should peptides go in your routine?
Peptides go on clean skin, before moisturiser, after nothing except perhaps a hydrating toner. The harder question is what to put around them — and that depends on which peptide.
On this page
In brief
Should you care? A little — the general rule (thinnest products first, peptides before heavier creams) covers most of it. The exception that actually matters is copper peptide and pure vitamin C, which is a real chemical incompatibility rather than a general layering guideline.The short version
- General rule: cleanse, thin watery actives first, peptides, then moisturiser, then sunscreen in the morning.
- Real exception: copper peptides and pure vitamin C — keep them in separate routines (AM/PM).
- Not a real exception: Matrixyl and Argireline have no comparable restriction.
The general order
Skincare layering generally follows thinnest-to-thickest consistency, because a heavier product applied first can block a thinner one from absorbing. For most peptide serums that means: cleanse, any water-thin actives, peptide serum, moisturiser, and sunscreen in the morning regardless of what else you used.
Where peptides sit in a full routine
| Step | What goes here |
|---|---|
| 1 | Cleanser |
| 2 | Toner or hydrating mist, if used |
| 3 | Water-thin serums (vitamin C, niacinamide) — see exception below for copper peptides |
| 4 | Peptide serum |
| 5 | Heavier serums or treatment oils |
| 6 | Moisturiser |
| 7 | Sunscreen (morning only, always) |
The one ingredient-specific exception
Most peptides in this table don’t care what’s near them. Copper peptide (GHK-Cu) is the exception, and it’s worth repeating because it’s the single most common mistake in a peptide routine: pure L-ascorbic acid vitamin C reacts with the copper chemistry and can inactivate both ingredients. Full detail on how to use copper peptides. Matrixyl 3000 and Argireline carry no comparable documented restriction.
Morning or evening?
Most peptide serums, copper peptide included, are commonly used in the evening, partly by convention and partly because it simplifies the vitamin-C separation above. There is no strong evidence that peptides themselves are light-sensitive or degrade meaningfully in daylight the way retinoids can — the evening placement is more about routine simplicity than a chemical requirement.
A simple routine, written out
Morning: cleanser → vitamin C (if used) → moisturiser → sunscreen.
Evening: cleanser → peptide serum (copper peptide, Matrixyl, or both) → moisturiser.
This keeps vitamin C and copper peptide in different sessions entirely without you having to think about it every day — the best kind of rule is the one you don’t have to remember.
References
- Standard cosmetic-formulation practice (apply thinner, more watery products before thicker, occlusive ones) rather than a specific study — this is a widely accepted formulation convention, not a claim requiring a clinical citation.
- Ascorbate–copper redox chemistry and pH dependence — see the how-to-use page for the full citation.