Olaplex No. 4P Blonde Enhancer Purple Toning Shampoo - Brightens

In this review of Olaplex No. 4P Blonde Enhancer Purple Toning Shampoo the bottom line is simple: it is made for people with blonde, lightened, or grey hair who want a quick, salon-grade way to neutralize brassiness while supporting hair health. The reviewer found the purple toning formula delivers visible reduction in yellow tones after a few washes and helps maintain color between salon visits. While some users report mild dryness, the product's core appeal is its combination of effective toning and the brand's reputation for repairing and strengthening hair.

Key Features

• Purple toning formula: Quickly counteracts brassiness and yellow tones to keep blonde and grey hair looking cooler and more vibrant after a couple of uses.
• Repairing technology: Formulated to support hair health and strength, helping hair feel less brittle after lightening treatments.
• Hydrating elements: Adds moisture to hair so strands feel softer and more manageable even when used for color correction.
• Color retention: Helps maintain salon color longer by reducing the warm tones that make blonde look faded.
• Luxurious feel: Customers report a high-quality texture and sensory experience that makes routine washing feel indulgent.

Who It's For

This shampoo is best for people with natural blonde, highlighted, bleached, or grey hair who want to neutralize unwanted yellow and brassiness without switching to a separate purple mask. It fits those who value both toning power and products that promote hair health rather than only cosmetic color correction.

Those with very dry or porous hair should test cautiously and consider pairing the shampoo with a richer conditioner or Olaplex treatment if they find it slightly drying. If a user wants a daily gentle cleanser with no toning pigments, a non-purple regular shampoo would be a better choice.

Pros & Cons

Pros

• Effective at eliminating brassiness and maintaining a cool blonde tone.
• Supports stronger, softer strands so hair feels healthier after use.
• Perceived as a high-quality, luxurious product by many customers.

Cons

• Some users report that it can be drying on already dry or damaged hair, so follow-up conditioning may be needed.

Specifications

Product name	Olaplex No. 4P Blonde Enhancer Purple Toning Shampoo
Intended hair types	Blonde, lightened, and grey hair
Main benefit	Neutralizes brassiness and brightens color
Secondary benefits	Repairs, hydrates, and improves hair softness
Formulation focus	Purple toning and hair-repair technology
Use case	Between-salon toning and color maintenance

Our Verdict

Olaplex No. 4P Blonde Enhancer Purple Toning Shampoo is a smart buy for anyone who needs reliable brassiness control and wants to support color retention without sacrificing hair condition. It is particularly worthwhile for lightened and grey hair that requires regular toning; those with very dry hair should plan to use a nourishing conditioner alongside it for best results.

Frequently Asked Questions

How often should I use this purple shampoo?
Use it as needed to control brassiness, often a couple times per week, and alternate with a regular moisturizing shampoo if dryness occurs.

Will it damage already lightened hair?
The formula is designed to support hair health and repair, but if hair is very damaged it is wise to combine it with treatments and conditioners to avoid added dryness.

Does it work on grey hair as well as blonde?
Yes, the purple pigments help neutralize yellowing in both blonde and grey hair to restore a cooler, brighter tone.