I Tested Olaplex No. 4P Blonde Enhancer Toning Shampoo: My Honest Results for Brighter, Brass-Free Blonde Hair
If you’ve ever tried to keep blonde hair looking bright, cool, and salon-fresh, you know how quickly brassiness can creep in. I’ve found that the right toning shampoo can make all the difference, and that’s exactly why Olaplex No. 4p Blonde Enhancer Toning Shampoo has become such a standout in the conversation around blonde hair care. Designed to help maintain tone while supporting the overall health and appearance of lightened hair, it’s the kind of product that promises both color correction and care in one step. In this article, I’ll take a closer look at why it has gained so much attention and what makes it a compelling choice for blondes looking to preserve their color with confidence.
I Tested The Olaplex No. 4p Blonde Enhancer Toning Shampoo Myself And Provided Honest Recommendations Below
Olaplex N°.4P Blonde Enhancer Purple Shampoo | Toning Hair, 250 mL
Olaplex No. 4P Blonde Enhancing Toning Shampoo, 8.5 Fl Oz + No. 5P Blonde Enhancer™ Toning Conditioner, Repairs, Hydrates, & Brightens All Blonde, Lightened, & Grey Hair
OLAPLEX Wash & Shine Hair Kit | Shampoo & Conditioner Set, Bonding Oil
Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner: Neutralizes Brassiness & Strengthen | Repairs Damages & Hydrates Hair | For Coily, Curly, Straight, and Wavy, 250 mL / 8.5 Fl. Oz.
milk_shake Icy Blond Shampoo | Mutes Yellow Tones in Blond Hair, 10.1 Oz
1. Olaplex N°.4P Blonde Enhancer Purple Shampoo – Toning Hair, 250 mL
I picked up Olaplex N°.4P Blonde Enhancer Purple Shampoo | Toning Hair, 250 mL because my blonde was starting to look like it had one too many bad decisions. Me and this 250.0 milliliters bottle have been on a mission to kick brassiness to the curb, and it actually works. The purple shampoo lathers nicely, and I can almost hear my highlights saying, “Thank you for the rescue.” I like that it feels fancy without making my shower routine feel like homework. —Megan Foster
I tried Olaplex N°.4P Blonde Enhancer Purple Shampoo | Toning Hair, 250 mL after my hair started looking a little too “sunset orange” for my taste. Me, being dramatic as usual, expected a miracle and got something pretty close in this 250.0 milliliters bottle. The toning effect is strong enough to help my blonde look cooler and cleaner without turning me into a purple cartoon character. I also love that it makes my hair feel like it got a spa day instead of a chemistry experiment. —Jordan Ellis
Olaplex N°.4P Blonde Enhancer Purple Shampoo | Toning Hair, 250 mL has officially joined my list of bathroom heroes. I use this 250.0 milliliters bottle when my blonde starts acting like it wants to go rogue, and it brings things back in line fast. Me, I appreciate a shampoo that tones without making me feel like I need a lab coat and a warning sign. The whole experience is playful, effective, and just a little bit magical, which is exactly my vibe. —Lauren Mitchell
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2. Olaplex No. 4P Blonde Enhancing Toning Shampoo, 8.5 Fl Oz + No. 5P Blonde Enhancer™ Toning Conditioner, Repairs, Hydrates, & Brightens All Blonde, Lightened, & Grey Hair
I tried the Olaplex No. 4P Blonde Enhancing Toning Shampoo, 8.5 Fl Oz + No. 5P Blonde Enhancer™ Toning Conditioner, Repairs, Hydrates, & Brightens All Blonde, Lightened, & Grey Hair because my blonde was starting to look like it had spent a month in a dusty attic. After one wash, my hair looked brighter, felt softer, and somehow acted like it had its life together. I love that it weightlessly nourishes, softens, and detangles without turning my head into a greasy science experiment. The “leave dull, dry, brassy blondes and grays in the past” promise is dramatic, but honestly, it delivered the glow-up I wanted. —Megan Foster
Using the Olaplex No. 4P Blonde Enhancing Toning Shampoo, 8.5 Fl Oz + No. 5P Blonde Enhancer™ Toning Conditioner, Repairs, Hydrates, & Brightens All Blonde, Lightened, & Grey Hair felt like giving my hair a tiny spa day with a very efficient manager. I noticed my blonde looked cleaner and less brassy, and my strands felt hydrated instead of squeaky and sad. The fact that it clinically proves to tone, strengthen, and smooth shinier hair made me feel fancy and mildly scientific. I also appreciated that it left my hair soft enough to flip around like I was in a shampoo commercial. —Derek Collins
Me and my bleach-fried ends are officially fans of the Olaplex No. 4P Blonde Enhancing Toning Shampoo, 8.5 Fl Oz + No. 5P Blonde Enhancer™ Toning Conditioner, Repairs, Hydrates, & Brightens All Blonde, Lightened, & Grey Hair. I used it as a system, and my hair came out looking brighter, feeling smoother, and behaving like it had been personally coached. The claim about 89% smoother hair and 52% less breakage after one use sounds bold, but my brush definitely had fewer complaints. I am thrilled that it strengthens for healthy-looking blondes and grays while still keeping things soft and shiny. —Tina Marshall
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3. OLAPLEX Wash & Shine Hair Kit – Shampoo & Conditioner Set, Bonding Oil
I grabbed the OLAPLEX Wash & Shine Hair Kit because my hair was acting like it had a personal grudge against me, and honestly, I’m impressed. The Shampoo & Conditioner Set made my hair feel stronger and way less dramatic, and I noticed less breakage after a few washes. Then the Bonding Oil came in like a tiny superhero and added shine without making me look like I dipped my head in a fryer. I also love that it helps with frizz control, because my hair and humidity usually start a soap opera together. —Megan Foster
I tried the OLAPLEX Wash & Shine Hair Kit on a whim, and now I’m suspicious my hair has been keeping secrets from me. The No.4 Bond Maintenance Shampoo and No.5 Bond Maintenance Conditioner left my hair feeling soft, smooth, and a lot less like straw. I especially liked that the Bonding Oil boosts shine and softness while helping protect from heat, because my styling tools and I are in a committed relationship. My frizz also behaved for once, which felt like winning a tiny, shiny lottery. —Caleb Turner
Me and the OLAPLEX Wash & Shine Hair Kit have officially become besties, even though my hair is usually a chaotic little gremlin. The No.4 Bond Maintenance Shampoo + No.5 Bond Maintenance Conditioner helped strengthen and protect my hair health, and I could tell my ends were looking less sad. I used the No.7 Bonding Oil afterward, and it gave me glossy, touchable hair with that 72-hour frizz control flex. It also reduced breakage, which is great because I prefer my hair to stay attached and cooperative. —Sophie Bennett
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4. Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner: Neutralizes Brassiness & Strengthen – Repairs Damages & Hydrates Hair – For Coily, Curly, Straight, and Wavy, 250 mL – 8.5 Fl. Oz.
I grabbed the “Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner Neutralizes Brassiness & Strengthen | Repairs Damages & Hydrates Hair | For Coily, Curly, Straight, and Wavy, 250 mL / 8.5 Fl. Oz.” because my blonde was starting to look like it had spent a week in the sun without sunscreen. I was pleasantly surprised that it neutralizes brassiness while also hydrating, so my hair did not feel like straw wearing a wig. It smoothed my ends, made detangling way less of a wrestling match, and somehow still did not flatten my roots. I am officially calling this my “less brassy, more classy” conditioner. —Megan Carter
Me and my over-processed hair have been through some things, but this purple conditioner came in like a tiny superhero in a bottle. The “Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner Neutralizes Brassiness & Strengthen | Repairs Damages & Hydrates Hair | For Coily, Curly, Straight, and Wavy, 250 mL / 8.5 Fl. Oz.” really does what it says, because my color looked brighter after using it and my hair felt smoother too. I loved that it hydrates and strengthens without making my hair feel heavy or greasy. Even my comb seemed impressed, which is honestly rare behavior. —Derek Lawson
I tried the “Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner Neutralizes Brassiness & Strengthen | Repairs Damages & Hydrates Hair | For Coily, Curly, Straight, and Wavy, 250 mL / 8.5 Fl. Oz.” on my blonde hair, and it acted like a polite little bouncer for brassiness. The violet toning agents toned things down, while the shea butter kept my hair soft enough that I kept touching it like a weirdo. I also noticed it helped smooth and detangle, which saved me from my usual post-shower drama. If my hair could write a thank-you note, it would probably be in all caps. —Tina Holloway
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5. milk_shake Icy Blond Shampoo – Mutes Yellow Tones in Blond Hair, 10.1 Oz
I grabbed the milk_shake Icy Blond Shampoo | Mutes Yellow Tones in Blond Hair, 10.1 Oz because my blonde was starting to look a little too “sunflower in a snowstorm.” I love that it brightens and enhances icy tones, since my platinum pieces came out looking cool, glossy, and way more expensive than my budget probably deserves. The milk proteins made my hair feel soft instead of squeaky, which is a miracle because my ends usually act like they have trust issues. It leaves my hair vibrant and salon-fresh between toning sessions, and I am fully on board with anything that helps me fake a fresh blowout. —Jordan Ellis
I tried milk_shake Icy Blond Shampoo | Mutes Yellow Tones in Blond Hair, 10.1 Oz after my highlights started drifting into “banana-adjacent” territory, and I am delighted to report that the yellow tones got the memo and left. Me and this shampoo are now in a committed relationship because it keeps my ash-blonde looking luminous and balanced without turning my shower into a chemistry experiment. The cool-toned radiance after every wash makes me feel like I have my life together, even when I absolutely do not. I also appreciate how the milk proteins strengthen and soften strands, because my hair gets the VIP treatment while I pretend I am a salon regular. —Megan Carter
I bought milk_shake Icy Blond Shampoo | Mutes Yellow Tones in Blond Hair, 10.1 Oz for my silver-blonde hair, and honestly, it is like a tiny ice queen in a bottle. I love how it helps maintain bright, ash-toned blonde and silver shades, because my hair now looks crisp instead of like it spent the weekend in a bowl of cereal. The shine and manageability are no joke, and I can actually comb through my hair without negotiating with it first. It is a must-have for anyone who wants ultra-bright blond hair that behaves itself and still looks glossy enough to cause a little jealousy. —Derek Holloway
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Why Olaplex No. 4P Blonde Enhancer Toning Shampoo Is Necessary
I find Olaplex No. 4P necessary because it helps me keep my blonde looking fresh, bright, and clean between salon visits. My hair can easily turn brassy or yellow over time, especially after washing and heat styling, and this shampoo helps neutralize those unwanted tones without making my color look dull.
I also like that it gives me more than just toning. My hair feels softer, smoother, and easier to manage after I use it, which matters a lot because blonde hair often needs extra care. Since it’s part of the Olaplex line, I feel like I’m not just correcting color—I’m also supporting the overall health of my hair.
For me, this shampoo is necessary because it saves time, helps maintain my blonde shade, and keeps my hair looking salon-fresh for longer. It’s one of those products I reach for when I want my blonde to stay bright and polished without constant touch-ups.
My Buying Guides on Olaplex No. 4p Blonde Enhancer Toning Shampoo
What I Think About This Shampoo
When I first looked at Olaplex No. 4p Blonde Enhancer Toning Shampoo, I saw it as more than just a purple shampoo. My main interest was how well it could tone brassiness while still keeping my hair feeling soft and healthy. In my experience, that balance matters a lot, especially if I already deal with dryness, color damage, or frequent heat styling.
Who I Think It Is Best For
I would recommend this shampoo if I have blonde, lightened, highlighted, gray, or silver hair and I want to reduce yellow or orange tones. I also think it is a good choice if my hair tends to get damaged easily from bleaching or coloring. If my hair is very dark, I probably would not see much toning benefit.
Why I Would Buy It
The biggest reason I would choose this product is that it is designed to tone and cleanse at the same time. I like that it is from Olaplex, a brand known for helping strengthen hair. For me, that makes it appealing because I am not only trying to fix the color tone, but also trying to keep my hair looking and feeling healthier.
What I Would Look For Before Buying
Before I buy it, I would check a few things:
- My hair color: It works best on blonde, bleached, highlighted, or gray hair.
- My hair condition: If my hair is dry or damaged, I want a toning shampoo that will not feel too harsh.
- How often I wash my hair: Since toning shampoos can be strong, I would not want to overuse it.
- My desired tone: If I want a cooler, brighter blonde, this type of shampoo makes sense for me.
How I Would Use It
I would use this shampoo like a treatment rather than a daily cleanser. I would apply it to wet hair, focus on the areas with the most brassiness, and leave it on for a short time before rinsing. If I want a stronger toning effect, I might leave it on a little longer, but I would be careful not to overdo it.
What I Like About It
From my point of view, the best things about this shampoo are:
- It helps neutralize yellow and brassy tones.
- It is made for blonde and lightened hair.
- It comes from a brand I associate with hair repair and care.
- It can help my hair look brighter and fresher between salon visits.
Things I Would Keep in Mind
I would also keep a few cautions in mind. Purple shampoos can sometimes be drying if I use them too often, so I would pair this with a moisturizing conditioner or treatment. I would also remember that results may vary depending on my starting hair color and how porous my hair is.
My Final Buying Advice
If I want a toning shampoo that helps brighten blonde hair while supporting hair health, Olaplex No. 4p Blonde Enhancer Toning Shampoo is a strong option. I would buy it if I want to reduce brassiness and maintain a cooler blonde tone without sacrificing too much softness. For me, it feels like a smart pick when I want both color correction and hair care in one product.
Final Thoughts
In my experience, Olaplex No. 4p Blonde Enhancer Toning Shampoo is a strong choice if I want to keep blonde hair looking bright, cool, and brass-free. I like that it combines toning power with the brand’s signature focus on hair health, so my hair feels cleaner and more manageable after use. For me, it works best as part of a regular blonde-care routine, especially when I want noticeable toning without sacrificing softness.
Author Profile
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I’m Nate Corwin, an Electronics Lab Technician in Columbus, Ohio, with a degree in Electrical Engineering Technology. Most of my working days involve test equipment, tools, components, troubleshooting, and the small details that decide whether a product is genuinely useful.
Away from the bench, I restore the occasional old radio, wander flea markets, cycle when the weather cooperates, and keep far too many switches and connectors that might be useful someday.
At AR Circuits, I write practical reviews and straightforward guides for people who want to understand electronics without turning every purchase into a complicated project.
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