Olaplex No. 0 Intensive Bond Building Hair Treatment is a professional-grade formula designed to repair and strengthen damaged hair from within. This treatment primes hair for deeper repair by penetrating the hair shaft to rebuild broken bonds, improving texture and resilience. Ideal for all hair types, it enhances the effectiveness of subsequent Olaplex treatments, leaving hair healthier, smoother, and more manageable. Use as the first step in your hair repair routine for visibly stronger, revitalized hair.