Up against dry, brittle and lacklustre lengths? Allow us to introduce you to OLAPLEX – the industry-adored, salon-quality range that restores compromised hair to its former glory. Starring a patented active ingredient that works on a molecular level, these formulas seek out broken bonds in the hair (which are caused by chemical, thermal and mechanical damage) and repair them, transforming your tresses' fortunes. Nothing short of a modern miracle, the No. 0 Intensive Bond Building Treatment is the ultimate companion to their bestselling No. 3 Hair Perfector: priming your hair for intensive repair. Here's your ticket to stronger, sleeker strands.