Restore your hair's natural health & shape with the Schwarzkopf Professional BC Bonacure Fibre Force Scalp & Hair Serum, a leave-in treatment for over-processed hair. Perfect for those who use a lot of heat styling or chemical treatments, the Fibre Force Scalp & Hair Serum targets weakened strands of hair to replenish lost nutrients & rebuild your cuticle's structure with its restorative formula. Infused with a high level of keratin concentrate, the intensive serum is designed to strengthen the inner bonds of your hair to re-create bounce, shine & overall hair health. Added Apple Stem Cell Extract strengthens each strand's infrastructure, making your hair feel glossy & soft to touch. Apply a few drops to your finger tips & massage all over your scalp & do not rinse.