Olaplex No.0 Intensive Bond Building Hair Treatment is the latest edition to the Olaplex "Take Me Home" retail range. No. 0 primes the hair for deeper repair, rebuilds hair bonds, strengthens, and protects hair integrity. Designed to be used as a two-stage treatment alongside the Olaplex No.3 Hair Perfector to strengthen and repair all types of damaged hair. Like all Olaplex products it is suitable for vegans and never tested on animals.