What Peptides does
Signal peptides such as palmitoyl pentapeptide-4 are intended to prompt collagen production; carrier peptides deliver trace elements like copper; neuropeptides such as acetyl hexapeptide-8 aim to soften expression lines.
The evidence base is real but modest, and mostly manufacturer-funded. Peptides are a reasonable supporting act, not a retinoid replacement.
Worth using if…
- Sensitive skin that cannot tolerate retinoids
- Supporting an anti-ageing routine
- Barrier-friendly formulas
Safety & watch-outs
- 'Peptide' on the front of a bottle says nothing about which peptide or how much.
- Some peptides are unstable at the low pH of a vitamin C serum — space them out.
Peptides in pregnancy: Not on standard avoid lists
Cosmetic peptides are not on standard pregnancy avoid lists; check specific products with your clinician.
Comedogenic rating: No published rating
No Fulton rating. Ratings come from the published Fulton scale, which was measured on rabbit ears rather than human faces — treat it as a rough signal, not a verdict on a finished formula.
Check a whole formula for pore cloggers →Common questions
Do peptides work as well as retinol?
No. The evidence gap is large. They are useful when retinoids are off the table.
Informational only, not medical advice. Written from public regulatory and dermatology references (EU Cosmetics Regulation annexes, SCCS opinions, CIR reviews, published Fulton-scale data). Concentration, formula and your own skin all change the outcome — consult a clinician for personal concerns.
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