At COSRX, we’ve always seen the scalp as an extension of the skin. Just like your face needs collagen, your hair—made of keratin—needs targeted care too. So, we brought our years of skincare expertise to hair care. The result? The PEPTIDE-132™ line, designed to keep your scalp healthy and your hair even healthier.
Creating Peptides Designed for Hair
Not all peptides are created equal.
We considered 20+ amino acids. Simulated thousands of formulas. And finally, we landed on one powerful solution: Hair Peptide-132™—made to protect and repair hair from the inside out.
How was PEPTIDE-132™ Born?
It started with a simple idea: what if peptides could do for your hair what they’ve done for your skin?
PEPTIDE-132™ was born from that question—and years of research later, it’s here to bring strength and shine back to your strands.
A Deep Dive into Hair Damage
We looked at what really breaks down hair: UV rays, heat, and chemical damage.
And here’s what we found: keratin molecules are too big to penetrate deeply—just like collagen in skin.
So we thought: let’s bring in peptides.
Creating Peptides Designed for Hair
Not all peptides are created equal.
We considered 20+ amino acids. Simulated thousands of formulas. And finally, we landed on one powerful solution: Hair Peptide-132™—made to protect and repair hair from the inside out.
How was PEPTIDE-132™ Born?
It started with a simple idea: what if peptides could do for your hair what they’ve done for your skin?
PEPTIDE-132™ was born from that question—and years of research later, it’s here to bring strength and shine back to your strands.
Real results. Real hair.
Stronger, shinier hair—proven by science and real users.
See the difference PEPTIDE-132 makes.
Yes! The scalp is skin!
It has the same basic layers as the rest of the body—epidermis, dermis, and subcutaneous tissue. However, it’s unique because it has more nerve endings, blood vessels, thicker hair follicles, active sebum production, faster skin cell turnover, and its own microbial balance.
These features mean the scalp needs extra care, which is essential for healthy hair from the root.
Hair bonds are the tiny connections inside each hair strand that hold everything together, like glue for your hair.
They give your hair its strength, elasticity, and shape. When these bonds break due to daily stresses caused by heat styling, brushing, coloring, or even sun exposure, your hair becomes weak, dry, and prone to breaking.
Keeping hair bonds healthy is essential for strong, shiny, and resilient hair.
PEPTIDE-132™ is a patented repair peptide designed to protect and strengthen damaged hair.
It bonds like puzzle pieces to keratin, the key protein in hair, filling in weakened areas and holding other beneficial ingredients in place. Made of three amino acids, this small-sized peptide (384.9 Da) penetrates deep into the hair cortex to repair broken bonds caused by physical and chemical damage.
This helps restore hair strength and improves overall hair health.
Yes! The PEPTIDE-132™ product line is designed to work effectively across all hair types, including straight, wavy, curly, and coily.
Hair damage can occur every day from styling, brushing, or environmental exposure, even if it isn’t immediately visible.
That’s why the patented PEPTIDE-132™ was developed to repair broken hair protein bonds and restore strength and elasticity from within.
Its ultra-light molecular weight allows deep absorption without any residue, making it gentle enough for daily use.
While each product is clinically effective on its own, using the full PEPTIDE-132™ routine delivers significantly better results.
In a 4-week clinical study, the 3-step routine (Shampoo, Treatment, and Oil Serum) improved hair protein bonding by 2.7x and softness by 1.8x compared to using a single treatment.
This step-by-step routine repairs, strengthens, and protects, leaving hair visibly healthier and scalp balanced.
The PEPTIDE-132™ products are infused with COSRX’s signature “Green Ivy” scent—a fresh, citrusy, and woody fragrance.
Inspired by serene bamboo forests, it opens with crisp green notes and finishes with soft, clean woods, creating a refreshing and uplifting experience.
Exclusively developed for COSRX, this subtle, gender-neutral scent is loved globally for its light and calming feel.
