How it works: 
Olaplex uses a patented active ingredient which works on repairing the hair from the inside out. It works on a molecular level to repair damaged and broken bonds in the hair that are caused by chemical, thermal, and mechanical damage. It can be used to restore damaged, dry, brittle and compromised hair, or as a tool to prevent breakage.

The sulphate-free, highly concentrated formula allows for customisable toning leaving blondes three times brighter than regular purple shampoos.

How to use: 
Apply the Olaplex No.4P Blonde Enhance Toning Shampoo to wet hair. Lather fully and let process 1-3 minutes. Rinse. For more intense toning, leave on up to 5 minutes.

Benefits Include:

• Strengthens, softens, and neutralizes unwanted yellow tones
• Hydrates and brightens; the longer you treat, the brighter the results
• Powered by Olaplex's patented Bond Building technology, it helps repair broken hair bonds and restore damage
• For all blonde, lightened and grey hair
• Gentle enough to use for every shampoo