The Olaplex No. 4P Shampoo is a versatile product that strengthens, softens, and eliminates those pesky yellow tones that dull your hair. This sulfate-free formula is highly concentrated, allowing you to customize the toning process for your desired level of brightness. Plus, with our patented technology, you can achieve healthy, hydrated, and radiant locks with every use. Whether it's natural or salon-treated hair, roots to tips or balayage, anyone can achieve the perfect blonde with this shampoo as a part of their routine.
Where: Apply to wet hair, lather fully, and let process.
When: 2-3 times per week or as often as needed to neutralise unwanted yellow tones.
