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.