The Peptide Report
Retinol has dominated anti-aging shelves for decades, but copper peptides like GHK-Cu are rewriting the playbook in 2026. Here's an evidence-based head-to-head on which ingredient truly rebuilds skin — and which might just irritate it.
Retinol exfoliates while GHK-Cu regenerates — and that mechanistic difference matters more than ever in 2026. Here's how copper peptides stack up against the gold-standard anti-aging ingredient for sensitive, mature, and barrier-compromised skin.
