This intensive treatment works to repair hair bonds while strengthening and protecting your locks. __Benefits:__ - Professionally inspired at-home treatment - Primes hair to absorb reparative nourishment - Contains the highest dose of patented Olaplex technology - Contains bis-aminopropyl diglycol dimaleate to restore and repair - The more used, the healthier your hair will become - 155ml Is your hair feeling dry and damaged? Olaplex No.0 Intensive Bond Building Hair Treatment is a vegan and cruelty-free professionally-inspired treatment that primes hair for deeper repair with the highest dose of patented Olaplex technology in an at-home product. It works by rebuilding and repairing hair bonds while strengthening and protecting your hair from the inside and out. For best results on dry and damaged hair, use it as the first step in a two-part system with N°.3 Hair Perfector once, twice to three times a week – depending on the severity of your distressed locks. It nourishes all hair types, especially those with visible damage from bleach and heat styling.