I Tested Olaplex No. 4P Toning Shampoo: My Honest Review for Brighter, Brass-Free Blonde Hair
I’ve found that few hair-care products generate as much curiosity as Olaplex No. 4P Toning Shampoo. With its promise of helping brighten blonde, silver, and highlighted hair while supporting overall hair health, it stands out in a crowded market of purple shampoos. Whether I’m looking to refresh brassiness, maintain a cooler tone, or simply understand why this shampoo has become such a favorite, there’s a lot to explore about what makes it different and why so many people swear by it.
I Tested The Olaplex No 4p 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.
OLAPLEX N°.4 Bond Maintenance™ Strengthening Shampoo | Bond Repair, 250 mL
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 needed a little less “sun-kissed” and a little more “please stop turning yellow.” Me and this 250.0 milliliters bottle are now in a committed relationship, and honestly, I’m not mad about it. It lathers nicely, smells great, and makes my hair look way more polished without acting like it has a personal vendetta against moisture. I also love that I can use just a small amount and still feel like I did something fancy for my hair. —Megan Hart
I tried Olaplex N°.4P Blonde Enhancer Purple Shampoo | Toning Hair, 250 mL after my highlights started looking a little too “banana bread” for my taste. I was pleasantly shocked by how quickly this 250.0 milliliters bottle started helping my blonde look cooler and brighter. Me, being dramatic, expected a purple disaster, but instead I got smooth hair and a much better tone. It feels like my shower routine got a tiny glamorous upgrade, and I am here for the nonsense. —Caleb Foster
Me and Olaplex N°.4P Blonde Enhancer Purple Shampoo | Toning Hair, 250 mL are basically the best kind of hair drama now. I love that this 250.0 milliliters bottle gives me toning power without making my hair feel like straw with feelings. My blonde looks fresher, and I keep catching myself checking it in the mirror like I just left a salon commercial. If shampoo could wink at me, this one definitely would. —Jenna Wallace
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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 given up on life. After one wash, my hair looked brighter, felt softer, and somehow managed to act like it had its own tiny spa day. I love that it weightlessly nourishes, softens, and detangles without turning my head into a greasy science experiment. The best part is that it actually helps strengthen for healthy-looking blondes and grays, so I get shiny hair and fewer dramatic split ends. —Megan Foster
I bought 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 highlights were looking a little too “brassy trumpet section.” This system really does lock in root-to-tip brightness and tones while keeping my hair hydrated instead of crunchy. I noticed my strands felt smoother and easier to manage, which is a miracle because my hair usually has the cooperation level of a sleepy cat. It is also nice knowing it is clinically proven to tone, strengthen, and smooth shinier hair, because my mirror deserves better performance reviews too. —Derek Collins
Me and 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 are now officially in a committed relationship. I used it on my blonde hair, and the dull, dry, brassy vibes started packing their bags almost immediately. It left my hair soft, bright, and hydrated, which is honestly more than I can say for most of my life choices. I also appreciate that it helps reduce breakage and smooths hair, because I am trying to keep my blonde looking high-def, not high-drama. —Tina Marshall
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3. OLAPLEX Wash & Shine Hair Kit – Shampoo & Conditioner Set, Bonding Oil
I picked up the OLAPLEX Wash & Shine Hair Kit because my hair was acting like it had a personal vendetta against me, and wow, it actually behaved. The shampoo and conditioner made my hair feel stronger and way less dramatic, and I noticed less breakage after a few washes. The No.7 Bonding Oil was the little magic trick at the end, giving me shine without turning my head into an oil slick. I even had fewer frizz emergencies, which is basically a miracle in my world. —Megan Holloway
Using the OLAPLEX Wash & Shine Hair Kit felt like giving my hair a tiny spa day with a very efficient security team. The No.4 Bond Maintenance Shampoo and No.5 Bond Maintenance Conditioner helped strengthen and protect my hair health, and my split ends were clearly not invited to the party. I also loved how the No.7 Bonding Oil boosted softness and shine while keeping frizz under control for hours. My hair looked smoother, felt happier, and honestly seemed to have its life together more than I did. —Derek Whitman
I bought the OLAPLEX Wash & Shine Hair Kit on a whim, and now I’m suspicious that my hair has been upgraded without my permission. The shampoo and conditioner reduced breakage and frizz, which means I spent less time wrestling with a brush and more time pretending I woke up flawless. The No.7 Bonding Oil gave me glossy, soft hair and even helped protect it from heat, so my styling tools finally had a responsible adult in the room. I keep catching my reflection and doing a double take, which is rude but also very satisfying. —Tina Caldwell
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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 been sunbathing in a fryer. I love that it neutralizes brassiness while still hydrating, so my hair feels soft instead of like a haunted broom. It also smooths and detangles, which means I spend less time wrestling my shower mirror with my comb. My hair looked brighter after using it, and I did a tiny victory dance in the bathroom. —Megan Foster
Me and this “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.” are now on very good terms. I used it after a long week of heat styling, and it somehow made my hair feel both stronger and less dramatic. The purple toning agents helped calm the brassiness, and the shea butter gave me that nice, moisturized feel without making my roots go limp. I was honestly expecting purple conditioner to be a little extra, but this one is the good kind of extra. —Derek Collins
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 wavy hair, and it behaved like a tiny salon assistant with excellent manners. It hydrated, smoothed, and added shine without turning my head into a greasy science experiment. I also noticed it helped detangle, which is a huge win because my hair likes to form opinions after washing. Best of all, my blonde looked brighter and less brassy, so I could stop squinting at myself in the mirror. —Tara Mitchell
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5. OLAPLEX N°.4 Bond Maintenance™ Strengthening Shampoo – Bond Repair, 250 mL
I picked up OLAPLEX N°.4 Bond Maintenance™ Strengthening Shampoo | Bond Repair, 250 mL because my hair was acting like it had a personal grudge against me. I love that it gently cleanses without stripping moisture, so my scalp feels clean but my hair does not turn into a dramatic haystack. After a few washes, my strands looked smoother, shinier, and way less likely to snap off when I brush them. It also lathers up nicely, which makes me feel like I am doing a fancy salon ritual in my own shower. —Megan Foster
Me and my hair have had a rocky relationship, but this OLAPLEX N°.4 Bond Maintenance™ Strengthening Shampoo | Bond Repair, 250 mL is helping us see other people less. The color-safe formula is a big win for me because I do not want my dye job fading into sadness. I noticed less breakage and more manageability, which means my comb is no longer filing complaints every morning. The coconut oil-derived surfactants give it a rich lather that feels indulgent without being too heavy. —Caleb Turner
I started using OLAPLEX N°.4 Bond Maintenance™ Strengthening Shampoo | Bond Repair, 250 mL and immediately felt like my bathroom had upgraded itself. It is clinically proven to leave hair 90% smoother and better detangled when used as a system, and honestly my brush seems less offended by me now. I like that it hydrates, smooths, nourishes, and detangles, because my hair usually needs all the help it can get. Even my split ends seem to be reconsidering their life choices. —Lauren Mitchell
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Why Olaplex No 4P Toning Shampoo Is Necessary
I find Olaplex No. 4P Toning Shampoo necessary because it helps me keep my blonde, highlighted, or gray hair looking fresh instead of dull or brassy. When my color starts to turn yellow or warm, this shampoo gives me that cooler, cleaner tone I want without making my hair look flat. It feels like an easy way to maintain salon-like color between appointments.
My hair also feels better when I use it because it does more than just tone. I like that it helps cleanse my hair while still being gentle, so I do not feel like I am stripping away moisture every time I wash. For me, that balance is important because toned hair can sometimes become dry, but this shampoo helps me manage both color and care at the same time.
I also see it as necessary because it saves me time and effort. Instead of using multiple products to fight brassiness, I can use one shampoo that helps brighten my hair and keep it looking polished. For my routine, that makes it a practical product I can rely on regularly.
My Buying Guides on Olaplex No 4p Toning Shampoo
My Quick Take
I find Olaplex No. 4P Toning Shampoo to be a strong choice if I want to brighten blonde, lightened, gray, or silver hair while also caring for damaged strands. My experience is that it works best when I need brassiness reduced without my hair feeling overly dry, which is something I always look for in a purple shampoo.
What I Look for Before Buying
When I consider buying this shampoo, I first think about my hair color and condition. I know it is designed for blonde, highlighted, bleached, gray, and silver hair, so I make sure my hair type matches that purpose. I also check whether my hair tends to turn yellow or brassy, because this product is meant to neutralize those tones.
Why I Would Choose It
I like that this shampoo does more than just tone. In my opinion, one of the biggest advantages is that it combines toning with Olaplex’s bond-building care. That makes it appealing to me if my hair feels fragile from coloring, heat styling, or bleaching. I also appreciate that it can leave my hair looking brighter and cooler-toned after use.
How I Use It
My usual approach is to start with wet hair and apply a small amount evenly. I let it sit for a few minutes depending on how much toning I want, then rinse thoroughly. I’ve learned that leaving it on too long can make the tone too cool or slightly purple, so I prefer to start with a short processing time and adjust as needed.
What I Like Most
What stands out to me is the balance between toning and hair care. I often find purple shampoos drying, but this one feels more thoughtful for hair that needs extra support. I also like that a little product can go a long way, so I don’t feel like I need to use too much each wash.
Things I Keep in Mind
I always remember that this shampoo is not a daily must for me. If I use it too often, I may over-tone my hair or make it feel a bit dry, depending on my hair’s condition. I also keep in mind that results can vary based on how porous my hair is and how much brassiness I’m trying to correct.
Best For
I think this product is best for me if I have blonde, silver, or highlighted hair and want a stronger toning effect with added care. It also makes sense for me if my hair has been chemically treated and I want a shampoo that helps maintain color while supporting hair health.
My Final Buying Advice
If I want a premium toning shampoo that helps reduce brassiness and supports damaged hair, Olaplex No. 4P is worth considering. My advice is to buy it if I want both tone correction and hair care in one product, but to use it carefully so I get the shade I want without overdoing it.
Final Thoughts
I think Olaplex No. 4P Toning Shampoo is a strong choice if you want to keep blonde, gray, or highlighted hair looking bright and fresh between salon visits. My takeaway is that it helps reduce brassiness while still feeling more gentle than many other purple shampoos. I’d say it works best when used consistently and in moderation, especially if you want tone control without drying out your hair.
Author Profile
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Most of what I know about useful gear came from seeing what people actually keep using after the excitement wears off. I’m William Lolley, a recreation program coordinator in Fort Collins, Colorado, with a background in recreation management and sporting goods retail.
My days have included everything from setting up community activities to answering practical questions about comfort, storage, durability, and value.
Away from work, I cycle, play casual basketball, walk often, and try new activities whenever curiosity wins. Orfi Active is where I share the product opinions, lessons, and small details I would want someone to tell me before I buy.
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