Gold Series Hair Repair Collection from Gold Series allows helps you to restore and rebuild damaged hair from within while improving your overall hair health in a few easy steps. Infused with biotin for strength and kukui nut oil for deep moisture, this system will leave your hair healthy, shiny and strong. Reduces breakage by 50% for 2X Stronger Hair. The Gold Series Hair Repair Overnight Repair Melting Serum hydrates to help repair and renew hair while you sleep.