Olaplex 9

Olaplex No.9 Bond Protector nourishing hair serum restores damaged hair from the inside. Unlike other active ingredients, the original Olaplex active ingredient does not work from the outside, but rather restores hair from the inside by permanently reconnecting broken disulfide bonds in the hair.
How to use: Apply a small amount to damp hair from roots to ends. Comb through and style hair.