MEDULLA Hyperlink Serum MEDULLA Hair Milk Leave-in Treatment Outbath Leave-in Treatment Outbath Treatment Hair Treatment Hair Care Damage Care Repair Weightless Hair Milk Silky Smooth Overnight Leave-in Treatment Hair impression reborn overnight. MEDULLA's highest-peak damage care, the leave-in hair serum "HYPERLINK SERUM" is born. It took about 18 months to productize, and with its carefully selected texture, it will lead your hair to its ideal form. □ Feature 1: Unique formula including Japan's first ingredient, a low-molecular-weight peptide The peptide, which is the key ingredient of this product, was developed with experts in functional raw material development both domestically and internationally. Through the fusion of hair science research and plant research, biomimetic ingredients with a structure similar to hair keratin are blended. It repairs hair three-dimensionally, at a deep level. □ Feature 2: Low-molecular-weight peptide that enables deep penetration Penetrates deep into the hair and repairs damage. It penetrates the hair with a light texture. While protecting the cuticles, it also protects against damage from external friction and prevents split ends.