Olaplex No. 0 Intensive Bond Building Hair Treatment is a professional, at-home system designed to repair and strengthen damaged or compromised hair bonds. It works by preparing the hair to absorb the benefits of Olaplex No. 3 for a deeper repair treatment. This intensive treatment is ideal for hair that has been weakened by chemical processes, heat styling, or mechanical damage. Used as a first step in a two-part system, it reactivates the bond-building technology deeply within the hair structure, leading to visibly healthier and more resilient hair over time. Incorporate this into a regular haircare routine for maximum restorative benefits.