Olaplex No.4P Blonde Hair Hydrating & Brightening Purple Toning Shampoo
Published By Vivienne Blake
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Our Verdict
Olaplex No.4P delivers on its promise of toning brassiness in blonde, lightened, and grey hair. Its purple pigment neutralizes yellow tones, revealing brighter, cooler hues. The hydrating formula cleanses without stripping moisture, leaving hair feeling soft and manageable. However, the high price point makes it a considered purchase. While the toning effect is noticeable, it isn't drastically different from more affordable purple shampoos. For those seeking a premium toning experience with added hydration, No.4P is worthwhile. If budget is a primary concern, explore drugstore alternatives. Ultimately, No.4P earns its reputation as a quality product, but its value depends on individual needs and budget.
Audience Score
Pros
- Neutralizes brassy and yellow tones in blonde, lightened, and gray hair.
- Hydrates and repairs damaged hair with patented Olaplex bond-building technology.
- Creates a brighter, more vibrant blonde.
- Sulfate-free and paraben-free, making it gentle on color-treated hair.
- Easy to use at home, maintaining salon-quality results between appointments.
Cons
- Can be drying if used too frequently.
- May stain porous or damaged hair.
- Can leave hair with a purple tinge if not rinsed thoroughly.
- The strong fragrance can be overpowering for some.
- Relatively expensive compared to other purple shampoos.
Comparison
The most similar products compared
 Olaplex No.4P Blonde Hair Hydrating | ||||
|---|---|---|---|---|
| Audience Score | 88 Great! | 88 Great! | 90 Excellent! | 88 Great! |
| Price | $32 | $38 | $35 | $13 |
| Size | 8.5 oz / 250 ml | 8 oz / 236 ml | 8.5 oz / 250 ml | 10 oz / 296 ml |
| Good For Thinning Hair | ✓ | ✗ | ✗ | ✗ |
| Good For Damage | ✓ | ✓ | ✓ | ✓ |
| Volumizing | ✗ | ✗ | ✗ | ✗ |
| Vegan | ✓ | ✓ | ✓ | ✗ |
| Without Sulfates | ✓ | ✓ | ✓ | ✓ |
| Without Parabens | ✓ | ✓ | ✓ | ✓ |
| Increases Shine | ✗ | ✓ | ✓ | ✗ |
Who Should Buy
This product is perfect for individuals with blonde, lightened, or gray hair struggling with brassiness, yellowing, or dullness. If you're looking to maintain a cool, bright blonde between salon visits, this shampoo can help. It's also ideal for those who want a hydrating shampoo that won't strip their hair of its natural oils, leaving it feeling dry and brittle. If your hair is damaged from bleaching or other chemical treatments, this shampoo's reparative properties can help restore its health and shine. Finally, if you're looking for a convenient way to tone your hair at home, this purple shampoo offers a user-friendly solution.
Who Should Not Buy
This product may not be suitable for individuals with naturally dark hair or those who are not looking to tone their hair. If you have very sensitive skin or scalp, you may want to test a small area first, as the toning pigments can sometimes cause irritation. If you're looking for a daily shampoo and don't need toning, a regular hydrating shampoo might be a better option. Finally, if you're on a strict budget, this product is a premium option and less expensive alternatives exist, though they may not offer the same level of repair and toning.
How To Use
Apply the Olaplex No.4P Blonde Enhancer Toning Shampoo to wet hair, lathering generously from roots to ends. Allow the shampoo to sit for 1-3 minutes for a subtle toning effect, or up to 5 minutes for more intense toning. The longer you leave it on, the more brassiness will be neutralized. Rinse thoroughly and follow up with your favorite conditioner, ideally Olaplex No.5 Bond Maintenance Conditioner, for optimal results. Use 2-3 times a week or as needed to maintain your desired blonde tone. For very porous hair, you might want to start with a shorter processing time to avoid over-toning.
Key Ingredients
Olaplex No.4P utilizes patented Bis-Aminopropyl Diglycol Dimaleate technology to repair broken disulfide bonds in the hair, strengthening and protecting it from further damage. This key ingredient helps to restore the hair's elasticity, reduce breakage, and improve overall health. The purple pigments in the shampoo neutralize yellow and brassy tones, brightening blonde, lightened, and gray hair. It also includes hydrating ingredients to prevent dryness and maintain moisture balance, ensuring your hair feels soft and manageable. The formula is sulfate-free, paraben-free, and phthalate-free, making it gentle on color-treated hair.
Key Benefits
Using Olaplex No.4P offers a range of benefits, including toning down unwanted brassy and yellow tones in blonde, gray, and lightened hair. It also repairs and strengthens damaged hair by re-linking broken disulfide bonds. The shampoo hydrates and softens the hair, leaving it feeling smooth and manageable, while also adding shine and vibrancy. Regular use can help maintain salon-fresh color for longer periods, reducing the need for frequent toning treatments. It provides a convenient at-home toning solution, saving you time and money.
What Makes it Unique
Olaplex No.4P stands out from other purple shampoos due to its patented bond-building technology, which goes beyond simply toning the hair. It actively repairs and strengthens the hair from within, addressing the underlying causes of damage. This unique combination of toning and repair makes it an ideal choice for those with bleached or chemically treated hair. The highly concentrated purple pigments provide effective toning while the hydrating formula prevents dryness often associated with purple shampoos. The sulfate-free and paraben-free formula ensures gentle cleansing without stripping the hair of its natural oils.