ARCHIVE

skincare guide

How to Choose a Firming Serum by Ingredient

A practical guide to choosing a firming serum by ingredient, including retinal, peptides, copper peptides, GHK-Cu, and PDRN — plus how TOUN28 Peptacica Serum and Blue Peptide Cica...

ingredient

What Is Blue Peptide? GHK-Cu and Copper Peptides Explained

A simple guide to Blue Peptide, GHK-Cu, Copper Tripeptide-1, and copper peptides — including how the terms differ and how TOUN28 uses them across its skincare routine.