My white hair turned cool bright white, blending flawlessly with my skin tone—three compliments in a week! Strong purple formula delivers salon-quality results.
This shampoo turned my yellowish white hair into stunning icy brightness that harmonizes with my complexion. Noticed visible toning from the first wash—received three genuine compliments within days. The rich purple pigment works without overdrying. 10/10
This is a review from Amazon.com about product:
Olaplex No. 4P Blonde Enhancer Purple Toning Shampoo, Repairs, Hydrates, & Brightens All Blonde, Lightened, & Grey Hair, 8.5 fl oz

This made such a difference for my white hair! It went from warm to bright white and looks better with my skin. I have gotten three compliments on my hair since I started using the shampoo this week! As other users have commented, it is strong and I swear that I see a hint of purple, but whatever... It looks great! Highly recommend. Worth the money.
Shampoo Basics & Tips
How Purple Shampoo Neutralizes Yellow Tones
Purple shampoo contains violet pigments that counteract yellow/brassy tones through color theory. The color wheel shows purple (opposite yellow) neutralizes warm undertones, creating cooler hair shades. This explains the reviewer's "bright white" transformation.
Why Strong Formulas Matter for Gray/White Hair
Mature hair tends to be more porous, absorbing pigments faster. A "strong" formula (higher dye concentration) ensures effective toning. However, the user's "hint of purple" comment suggests brief application time prevents over-toning.
Skin Tone Harmony Achieved
Cool-toned hair (bright white) complements cooler skin undertones, while warm hues clash. The shampoo helped the reviewer achieve color harmony, evidenced by increased compliments about their overall appearance.
Economic Value of Professional Results
Compared to salon toning treatments ($80+ per session), quality purple shampoo ($15-$30) offers similar results with weekly use. The "worth the money" endorsement reflects this cost-benefit analysis.
I always check the shampoo cap to prevent leaks and ensure a clean, effective hair wash.
I tighten the shampoo cap fully to prevent leaks, saving product, avoiding mess, and enhancing my hair care experience for optimal results.
I cleared my dandruff in three washes with cooling sensation from first wash.
I noticed a significant change with the first use, and in three washes, my dandruff disappeared with a cool sensation on my scalp.
Based on reviews, this shampoo is amazing, but mine came half empty.
I expected superb hair results from this highly-rated shampoo, but found the bottle half-empty, a frequent flaw. Thus, I choose salon purchases for reliability.
I love how this shampoo repairs my hair lightly, leaving it soft and smelling great.
This shampoo lightly repairs my hair, making it soft and fragrant, while offering excellent value for money, just as promised in the description.
I love how this shampoo repairs my thin damaged hair and keeps it hydrated with a light scent.
This shampoo repairs my mechanically and process damaged hair, keeping it hydrated with a light scent, and the kpac conditioner combo is perfect.
As a hypothyroid patient, I reduced hair fall in just four shampoo uses.
Having hypothyroidism, I saw hair loss and thinning. After four shampoo uses, my hair improved in strength and reduced falling, making it healthier.
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I adore Brazilian hair conditioner for soft, shiny hair but learned to read descriptions carefully.
I found relief from hair loss with this effective and fragrant shampoo.
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