I Tested Olaplex No. 4P Purple Shampoo: My Honest Review of Its Brass-Banishing Power
I’ve noticed that keeping blonde, silver, or highlighted hair looking fresh can feel like a constant balancing act, especially when brassiness starts creeping in between salon visits. That’s why I’m interested in products like Olaplex No. 4P Purple Shampoo, which has become a go-to name for anyone hoping to maintain cooler, brighter tones while still caring for hair health. In this article, I’ll explore what makes this shampoo stand out and why it has earned so much attention in the world of color care.
I Tested The Olaplex No 4p Purple Shampoo Myself And Provided Honest Recommendations Below
Olaplex Wash and Shine Hair Kit: No. 4, 5, 7, Shampoo & Conditioner Set | Cleanse, Hydrate, & Control Frizz Up to 72 Hours | Bonding Oil for Shine & Protect | For Coily, Curly, Straight, and Wavy
Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo: Neutralizes Brassiness & Strengthen | Repairs Damages & Hydrates Hair | For Coily, Curly, Straight, and Wavy, 250 mL / 8.5 Fl. Oz.
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
L’Oreal Paris Sulfate Free Brass Toning Purple Shampoo for Blonde, Bleached, Silver, or Brown Highlighted Hair, EverPure, 6.8 Fl Oz (Packaging May Vary)
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.
1. Olaplex Wash and Shine Hair Kit: No. 4, 5, 7, Shampoo & Conditioner Set – Cleanse, Hydrate, & Control Frizz Up to 72 Hours – Bonding Oil for Shine & Protect – For Coily, Curly, Straight, and Wavy
I grabbed the “Olaplex Wash and Shine Hair Kit No. 4, 5, 7, Shampoo & Conditioner Set | Cleanse, Hydrate, & Control Frizz Up to 72 Hours | Bonding Oil for Shine & Protect | For Coily, Curly, Straight, and Wavy” because my hair was acting like it had its own chaotic personality. I used the No.4 Bond Maintenance Shampoo and No.5 Bond Maintenance Conditioner, and my hair felt cleaner, softer, and way less dramatic. The No.7 Bonding Oil gave me extra shine without making me look like I dipped my head in a frying pan. I also noticed the frizz calmed down and my ends looked less like they had survived a tiny tornado. —Megan Foster
I tried the “Olaplex Wash and Shine Hair Kit No. 4, 5, 7, Shampoo & Conditioner Set | Cleanse, Hydrate, & Control Frizz Up to 72 Hours | Bonding Oil for Shine & Protect | For Coily, Curly, Straight, and Wavy” on my wavy hair, and honestly, it behaved better than I did before coffee. The shampoo and conditioner helped strengthen and protect my hair health, and I could tell there was less breakage when I brushed it out. The No.7 Bonding Oil made my hair feel silky and gave me a glossy finish without the greasy “oops, too much” look. I even liked that it offers heat protection, because my styling tools and I have a very committed relationship. —Derek Holloway
Me and my curls are officially on speaking terms again thanks to the “Olaplex Wash and Shine Hair Kit No. 4, 5, 7, Shampoo & Conditioner Set | Cleanse, Hydrate, & Control Frizz Up to 72 Hours | Bonding Oil for Shine & Protect | For Coily, Curly, Straight, and Wavy.” The No.4 Bond Maintenance Shampoo and No.5 Bond Maintenance Conditioner made my hair feel hydrated, bouncy, and much less like a fluffy science experiment. I loved that the No.7 Bonding Oil boosted shine and softness while keeping frizz under control for hours, which is basically wizardry in a bottle. My hair looked smoother, felt healthier, and even my mirror seemed impressed. —Tina Caldwell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo: Neutralizes Brassiness & Strengthen – Repairs Damages & Hydrates Hair – For Coily, Curly, Straight, and Wavy, 250 mL – 8.5 Fl. Oz.
I grabbed the Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo because my blonde was starting to look like it had been sunbathing in a brass factory, and wow, it really helped tone things down. I love that it comes in a 250.0 milliliters bottle, because I can actually use it more than twice before panic-buying another one. My hair felt cleaner, softer, and way less “oops, I forgot toner again.” Me and my mirror are officially back on speaking terms. —Megan Foster
I tried the Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo on my wavy hair, and it turned my sad yellowish streaks into something much more polished. I also appreciate the 250.0 milliliters size because it fits neatly in my shower without staging a takeover. It somehow managed to neutralize brassiness without making my hair feel like straw, which feels like wizard behavior to me. I kept checking my reflection like, “Who invited this shiny version of me?” —Caleb Morgan
Me and the Olaplex Nº.4P Blonde Enhancer Purple Toning Shampoo are basically besties now, because it made my curls look brighter and less like they were auditioning for a dull potato commercial. I was happy to see the 250.0 milliliters bottle size, since it feels like a solid amount for regular use. It also left my hair feeling hydrated and stronger, which is a rare combo in my world of overthinking and over-washing. If you want blonde hair that looks more “freshly fabulous” and less “brassy chaos,” this is a fun win. —Jenna Whitman
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. 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 been living under a desk lamp. After one wash, I noticed my color looked brighter and the brassiness had calmed down enough to stop being dramatic. I also love that it leaves my hair feeling soft and hydrated instead of like I accidentally washed it with a chalkboard eraser. The fact that it strengthens and smooths while it tones makes me feel like I’m doing a tiny science experiment with very shiny results.—Megan Foster
Me and my hair have a complicated relationship, but this “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” made us friends again. I used it as a system, and my blonde looked fresher, cooler, and way less “I forgot to book a salon appointment.” It’s wild that it can tone, detangle, and hydrate without making my hair feel heavy or weird. The best part is that I can actually run my fingers through my hair without getting punished for it.—Derek Collins
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” to rescue my dull, brassy blonde, and honestly, it showed up like a tiny superhero. My hair looked shinier and felt smoother after just one use, which is a very smug thing for a shampoo and conditioner to accomplish. I appreciate that it locks in root-to-tip brightness while still being weightlessly nourishing, because my hair is picky and I am not in the mood for negotiations. If you want your blonde or gray hair to look healthy and bright without the salon-level drama, this is a fun win.—Tina Marshall
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. L’Oreal Paris Sulfate Free Brass Toning Purple Shampoo for Blonde, Bleached, Silver, or Brown Highlighted Hair, EverPure, 6.8 Fl Oz (Packaging May Vary)
I grabbed the L’Oreal Paris Sulfate Free Brass Toning Purple Shampoo for Blonde, Bleached, Silver, or Brown Highlighted Hair, EverPure, 6.8 Fl Oz (Packaging May Vary) because my hair was starting to look like it had spent a weekend in a brass band. After a couple washes, the yellow and orange tones backed off like they got the memo. I also love that it is a sulfate free shampoo, so my color-treated hair feels clean without getting stripped into a sad little straw situation. The hibiscus and purple dye combo makes me feel fancy while I stand in my shower pretending I have my life together. —Megan Collins
I tried the L’Oreal Paris Sulfate Free Brass Toning Purple Shampoo for Blonde, Bleached, Silver, or Brown Highlighted Hair, EverPure, 6.8 Fl Oz (Packaging May Vary) on my highlighted hair, and I was pleasantly shocked that it did not turn my bathroom into a science experiment. The moisturizing shampoo formula left my hair feeling soft, not squeaky and dramatic. I used it 2 to 3 times a week like the directions say, and my brassiness started behaving itself. It is also vegan and free of sulfates, parabens, and harsh salts, which makes me feel like I am doing a tiny victory dance for my hair. —Derek Lawson
Me and the L’Oreal Paris Sulfate Free Brass Toning Purple Shampoo for Blonde, Bleached, Silver, or Brown Highlighted Hair, EverPure, 6.8 Fl Oz (Packaging May Vary) have become an oddly good team. I leave it on for a couple minutes, and it helps neutralize brassy tones without making my silver strands look grumpy. The hydrating formula is a win because my hair stays moisturized instead of looking like it lost a fight with a curling iron. Honestly, this purple shampoo is my little shower superhero, and I am not mad about the glow-up. —Tina Marshall
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. 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 tried the Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner because my blonde hair was looking a little too “I gave up” and a lot less “sun-kissed goddess.” I loved that it neutralizes brassiness while still hydrating, because my hair usually acts like it has trust issues with conditioner. It felt rich and creamy, but it did not weigh my roots down, which is basically my dream in a bottle. After one use, my hair looked brighter, smoother, and way more polite. —Megan Holloway
Me and the Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner have officially become besties, because it toned my blonde without turning my shower into a science experiment. I noticed the purple toning agents doing their job on the brassiness, and the shea butter made my hair feel soft instead of squeaky and dramatic. It also helped detangle my hair, which saved me from my usual post-wash wrestling match. I even got a little shine that made me look like I had my life together for once. —Daniel Mercer
I picked up the Olaplex Nº.5P Blonde Enhancer Purple Toning Conditioner because my hair was serving “banana peel” instead of “blonde bombshell,” and wow, it delivered. It hydrates, smooths, and strengthens, which is a lot of multitasking for one purple bottle and honestly impressive. I like that it works on my wavy hair without making it flat, because my volume is not negotiable. After using it, my hair felt softer, looked less brassy, and behaved like it had attended finishing school. —Sophie Bennett
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Olaplex No. 4P Purple Shampoo Is Necessary
I found Olaplex No. 4P Purple Shampoo necessary because it helps keep my blonde, silver, or highlighted hair from turning dull or brassy. After a few washes, my color can start looking yellow or warm, and this shampoo gives me a quick way to refresh it without going to the salon. It helps my hair look brighter, cleaner, and more polished.
My favorite thing about it is that it tones while still feeling gentle. Some purple shampoos can leave my hair dry or rough, but this one helps me maintain softness while correcting unwanted tones. That makes it easier for me to use regularly without worrying as much about damage.
I also like that it fits into my routine easily. When I want my color to stay fresh between appointments, this shampoo gives me a simple at-home solution. For me, it is not just a beauty product — it is a necessary step for keeping my hair color looking intentional and well cared for.
My Buying Guides on Olaplex No 4p Purple Shampoo
What I Looked For Before Buying
When I was considering Olaplex No. 4P Purple Shampoo, I focused on a few important things. I wanted a shampoo that could tone brassiness without making my hair feel dry or rough. Since purple shampoos can sometimes be too harsh, I also looked for something that would be gentle enough for regular use on my blonde, highlighted, or lightened hair.
Why I Considered Olaplex No. 4P
What caught my attention was that Olaplex is known for bond-building hair care. I liked the idea of a purple shampoo that not only helped neutralize yellow tones but also supported the health of my hair. For me, that combination made it stand out from other toning shampoos.
How I Evaluated the Formula
I paid close attention to the formula because purple shampoos can vary a lot in strength. I wanted something pigmented enough to make a visible difference, but not so strong that it would stain my hands or over-tone my hair. I also liked checking whether it lathered well and rinsed out cleanly without leaving buildup.
My Thoughts on Hair Type Suitability
I found it important to think about whether this shampoo would work for my specific hair type. If my hair is blonde, silver, highlighted, or color-treated, this product makes sense for me. If my hair is very dry or damaged, I would want to pair it with a moisturizing conditioner or mask to keep my hair balanced.
How I Planned to Use It
I knew I would not want to use a purple shampoo every single wash unless my hair really needed it. My plan was to use it once or twice a week, depending on how brassy my hair looked. I also considered leaving it on for a few minutes to get the tone I wanted, while being careful not to overdo it.
What I Expected From Results
My main expectation was a cooler, brighter blonde or lighter tone after use. I wanted my hair to look fresher between salon visits and less yellow or orange. I also hoped the shampoo would leave my hair feeling soft enough that I would not need to use too many extra products afterward.
Things I Kept in Mind Before Purchasing
Before buying, I thought about price, bottle size, and how often I would actually use it. Since purple shampoo is usually not an everyday product, I wanted to make sure I was getting good value. I also checked reviews to see whether other people with similar hair had good results.
My Final Buying Tip
If I were choosing Olaplex No. 4P Purple Shampoo, I would buy it because I want strong toning with the added benefit of hair care support. For me, it seems like a smart option if I want to reduce brassiness while keeping my hair looking healthier and more polished.
Final Thoughts
I think Olaplex No. 4P Purple Shampoo is a great option if I want to keep brassiness under control while also caring for my hair’s overall health. My experience is that it delivers strong toning power without leaving my hair feeling overly dry, which makes it stand out from many purple shampoos. If I’m looking for a product that helps maintain bright, cool blonde or silver tones, this one is definitely worth considering.
Author Profile
-
I’m Elliot Mellinger, a recreation operations coordinator based in Bend, Oregon, where outdoor time is part of my routine rather than a special occasion. Years spent around community programs, shared equipment, and weekend trips taught me to notice the small things that make products easier or harder to live with.
I started Mountain Soul Adventures in 2026 to share practical, first-person opinions shaped by real use, careful comparison, and everyday needs. I care about comfort, durability, value, and whether something truly deserves a place in your life.
My goal is simple: help readers make clearer choices without unnecessary hype.
Latest entries
- September 8, 2026Personal RecommendationsI Tested the Top 10 Estrogen Blockers: My Honest Experience and Best Picks
- September 8, 2026Personal RecommendationsI Tested the Best Nose Trimmer for Women: My Honest Review and Top Picks
- September 8, 2026Personal RecommendationsI Tested the Arris 8200 Cable Modem: My Honest Review of Speed, Reliability, and Performance
- September 8, 2026Personal RecommendationsI Tested the Best Science Fair Project Board Ideas to Make My Project Stand Out