Cosrx Expands into Haircare
Cosrx, the cult-favourite K-beauty brand, is entering haircare with its new Peptide-132 Haircare Collection, a performance-led, three-step system designed to repair damage, strengthen strands, and boost shine.
In creating the collection, Cosrx brought its results-driven skincare expertise to hair and scalp health, tapping into the growing ‘skinification of hair’ trend. As consumers increasingly prioritise scalp health and seek active-led solutions once reserved for facial care, they’re also drawn to the ultra-sleek, high-shine finishes popularised by the viral glass hair trend. With this new range, Cosrx aims to deliver on both fronts.
“We didn’t want to create just another haircare line. We wanted to take what we know best — skin science — and apply it to the scalp and hair,” the brand said in a statement. “Peptide-132 is the result of over two years of research and development, and it represents our commitment to creating truly functional, transformative products.”
Leading the collection is Peptide-132, a patented tripeptide developed by Cosrx’s in-house R&D team using 3D laser scanning and molecular modelling. Designed to penetrate the hair shaft and bind to weakened keratin bonds, it helps restore strength, improve manageability, and deliver a smooth, glossy finish. Clinically tested and exclusive to Cosrx, Peptide-132 has been shown to reduce breakage and enhance shine, even after just one use.
The collection has launched with three products, each dermatologist-tested, pH-balanced, and suitable for all hair types, delivering visible transformation without irritating the scalp.
Designed to go beyond basic cleansing, the Ultra Perfect Hair Bonding Shampoo uses Peptide-132 to strengthen damaged strands from within. Its refreshing lather deeply cleanses without leaving residue, while scalp-soothing actives, including piroctone olamine, zinc PCA, and caffeine, help rebalance oil, calm irritation, and reduce flakes. With a mildly acidic pH that supports the scalp’s natural barrier, it leaves hair soft, smooth, and manageable after every wash.
The Ultra Perfect Hair Bonding Treatment is a rich, salon-grade treatment formulated for intensive repair. Infused with Cosrx’s patented tripeptide, it penetrates deeply to rebuild broken bonds, while plant-based oils seal in moisture and smooth the cuticle. The cream texture absorbs easily, leaving hair soft, shiny, and resilient, with no heaviness or residue. Suitable for everything from mild dryness to post-bleach damage.
Finishing the routine is the Ultra Perfect Hair Bonding Oil Serum, a weightless formula that delivers instant smoothness, shine, and softness without the grease. The brand’s peptide complex targets damaged areas to restore structure and lock in moisture, while botanical oils form a protective barrier to reduce frizz, seal split ends, and defend against environmental stressors. It’s ideal for coarse, brittle, or lacklustre hair in need of daily nourishment.
The Peptide-132 Haircare Collection is available now at cosrx.com and Amazon, priced at $23 per product, with a UK release date still to be announced.