OYA ELIXER (reconstructive hair care additive) (Inter molecular hair Bonding) A reconstructive additive designed to penetrate the hair cuticle and reconstruct from within, promoting strong, shiny, naturally healthy hair. Noticeably improves color and lightening performance while locking in color, improving pigment retention. Convenient, easy to use one-step process with no additional processing time necessary and absolutely no change in formula needed..  (50 ml / 1.7 fl. oz.). Professional salon treatment.