K18 sells peptide hair care products to reverse hair damage.

K18 earns strong reviews for visibly repairing damage—especially on bleached or heat-stressed hair—delivering soft, shiny, frizz-tamed results with its Leave-In Molecular Repair Hair Mask and supportive shampoos, oils, and the AirWash dry shampoo. Reviews also flag drawbacks: inconsistent results for healthy or fine hair, occasional heaviness or clumping if overused, starchy or scalp-icky residue from AirWash, and shampoos that can feel harsh or drying.

Chelatingmist

Molecularleavein

K18mask

Shampoo 

Conditioner

Hair Oil

Peptide Prep

Leave In Mask

Detox + Repair Anywhere Set

Damage Control Duo Set

Damage Shield Protective Conditioner

Repair + Protect Mini's Hair Set

AirWash Dry Shampoo | 118 ml / 4 oz

Mini Damage Repair Essentials Hair Set

Mini Molecular Repair Hair Mask & Oil Value Set

Full-Size Leave-In Molecular Repair Hair Mask 50ml

AstroLift Reparative Volume Spray 118 ml

Leave In Molecular Repair Hair Mask

Damage Shield pH Protective Shampoo

Peptide Prep Detox Shampoo

Professional Molecular Repair Hair Mist

Mini Leave-In Molecular Repair Hair Mask 15ml

Molecular Repair Hair Oil -30ml

K18 Peptide Prep Detox Shampoo and Hair Mask Duo

K18 Peptide Prep pH Maintenance Shampoo And Hair Mask Duo

Reset + Repair Hair Kit

Hair Repair Starter Set

About K18