Olaplex No. 1 is a professional hair treatment designed to repair and strengthen damaged hair. It works by reconnecting broken disulfide bonds in the hair structure, which can be compromised due to chemical treatments, heat styling, or environmental factors. This product is typically used in salons during chemical processes like coloring or bleaching. After applying Olaplex No. 1, it is usually followed by Olaplex No. 2, which further enhances the repair process. Together, these products help improve hair texture, reduce breakage, and promote overall hair health, making them popular among both stylists and clients.