The beauty science of peptides.
Ingredient explainers and independently tested serum roundups — no hype, no jargon, just what the cosmetic literature actually says.
Know your peptides
The four topical peptides worth understanding — what each one is, what it does for skin, and how to use it.
GHK-Cu
The signal peptide behind copper-peptide serums — firmness, tone and barrier support.
Copper peptides
How the wider copper-peptide category works, and how it differs from GHK-Cu alone.
Matrixyl
The palmitoyl-peptide complex studied for the look of lines and skin smoothness.
Argireline
Acetyl hexapeptide-8 — the topical peptide marketed for expression-line softening.
Serum roundups
Hands-on, criteria-driven roundups of the peptide serums worth your shelf space.
Best copper peptide serums
Our top copper-peptide picks, scored on formula, concentration and finish.
Best GHK-Cu serums
The GHK-Cu serums that balance evidence-aligned formulas with real usability.
Matrixyl vs retinol
Two anti-ageing routes compared — how they differ and whether to layer them.
How we test and choose
Every roundup follows the same criteria: formula transparency, peptide concentration where disclosed, texture, and value. We buy or sample what we review and disclose every affiliate link.