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 appreciate the soft hair feel, yet the strong scent bothers me.
I truly enjoy the soft and manageable hair from this set, but the strong scent is too overpowering for me.
My hair is smoother, less frizzy, softer, and I love the smell.
This shampoo leaves my hair smooth, frizz-free, and soft. I love its scent and quality, and I'll order the conditioner.
This high-quality shampoo works wonders on my short hair with minimal use.
I find this high-quality shampoo excellent for my short hair as a small amount delivers soft, frizz-free results that I truly enjoy every day.
I found this shampoo fades color quickly, though hair feels rough without conditioner.
This shampoo removes hair color effectively but makes it rough; conditioner smooths it, and I saw results after one use.
I love how this lavender shampoo tames my frizzy hair and smells amazing.
My thick, frizzy hair is now soft and manageable thanks to this amazing lavender mint shampoo that has a long-lasting fragrance.
I find this shampoo effective but too masculine and low on lather.
This men's shampoo cleans effectively and has a good smell, but the scent is too masculine for my taste, and I wish it produced more lather for better coverage.
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