Promois series is peptide, obtained through the hydrolysis of natural proteins, and their derivatives.
Promois WK/ WK-F is hydrolyzed keratin. It has excellent hair repairing effect because of its special structure, containing cystine. Cystine of human hair has disulfide (-S-S-) bonds which contributes to hair strength, but is reduced by damage such as perming, hair-coloring and bleaching processes. Promois WK can supply cystine lost by damages and repair hair effectively.
INCI name: Hydrolyzed Keratin, Water