Apply to wet hair. Lather thoroughly and let process 1-3 minutes. Rinse. For more intense toning, leave on hair for up to 5 minutes. The ingredient line up in a single bottle of No.4 makes the shampoo a one-stop shop for a well rounded, healthy, hair care ritual starting with Olaplex’s patented ingredient, Bis-Aminopropyl Diglycol Dimaleate. Olaplex developed and patented Bis-Aminopropyl Diglycol Dimaleate which became the first ingredient of it’s kind in the new bond builder category. This innovative ingredient protects, nourishes, and restructures hair internally.

Think of it this way — if you’re dying your hair blonde, investing in products that protect your hair color should feel like a no-brainer. I’d heartily recommend this to anyone looking to stretch out time between salon visits, or just feel like they’re actively working to preserve their color. Even if your hair isn’t dyed, I’d recommend any of Olaplex’s offerings to keep it healthy and free from environmental or styling damage. If your hair tends to get lighter in the sun, this would be a great option to keep those tones as light and bright as you want, for as long as possible. This shampoo is definitely for you if you’re struggling with brassiness — blonde, gray, or otherwise. Highly concentrated formula neutralizes unwanted yellow tones while strengthening and softening hair Firstly, we’ve got to explain what makes Olaplex so special and why we need their bond maintenance treatments in our lives.Water (Aqua/Eau), Sodium Lauroyl Methyl Isethionate, Cocamidopropyl Hydroxysultaine, Potassium Cocoyl Glycinate, Disodium Cocoyl Glutamate, Sodium Lauroyl Sarcosinate, Potassium Cocoate, Decyl Glucoside, Glycereth-26, Bis-Aminopropyl Diglycol Dimaleate, Cocamidopropylamine Oxide, Disodium Laureth Sulfosuccinate, Glycol Distearate, Sodium Cocoyl Glutamate, Methyl Gluceth-20, Acrylates Copolymer, PEG-120 Methyl Glucose Dioleate, Amodimethicone, Citric Acid, Sodium Lauryl Sulfoacetate, Polyquaternium-10, Ethylhexylglycerin, DivinylDimethicone/Dimethicone Copolymer, Polyquaternium-11, Trisodium Ethylenediamine Disuccinate, Guar Hydroxypropyltrimonium Chloride, C11-15 Pareth-7, Laureth-9, Glycerin, Trideceth-12, C12-13 Pareth-23, C12-13 Pareth-3, Hydrolyzed Vegetable Protein, PG-Propyl Silanetriol, Panthenol, Acetic Acid, Tetrasodium EDTA, Pentasodium Triphosphate, Sodium Hydroxide, Disodium EDTA, Helianthus Annus (Sunflower) Seed Oil, Tocopherol, Prunus Armeniaca (Apricot) Kernel Oil, Pseudozyma Epicola/Camellia Sinensis Seed Oil Ferment Extract Filtrate, Pseudozyma Epicola/Argania Spinosa Kernel Oil Ferment Filtrate, Quaternium-95, Propanediol, Helianthus Annus (Sunflower) Seed Extract, PEG-8, Euterpe Oleracea Fruit Extract, Punica Granatum Extract, Rosemarinus Officinalis (Rosemary) Leaf Extract, Musa Sapientum (Banana) Fruit Extract, Origanum Vulgare Lear Extract, Morinda Citrifolia Fruit Extract, Articum Lappa Root Extract, PEG-8/SMDI Copolymer, Sodium Hyaluronate, Palmitoyl Myristyl Serinate, Sodium Polyacrylate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Biotin, Benzoic Acid, Phenoxyethanol, Chlorphenesin, Potassium Sorbate, Sodium Benzoate, Fragrance(Parfum), Citral, Hexyl Cinnamal, Limonene Inspired by salons, proven by science. No.4P Blonde Enhancer Toning Shampoo combines a high amount of pigment concentration with our patented bond-building technology & mild surfactants to provide a highly concentrated purple shampoo to deliver 3X brighter results (compared to top brands), yet gentle enough for frequent use (we recommend 2-3x weekly). Admittedly, the levels of this particular ingredient aren’t as high in this formula as in the salon-only treatments—but every little helps when you consider that the oxygen molecules in peroxide attach themselves to bonds and deplete the hair's protein, leaving it brittle.What's more, like all Olaplex products, No. 4P Shampoo is both vegan and cruelty-free, as well as containing no formaldehyde, sulfates, parabens, phosphates, or phthalates. Application—How to use the Olaplex No.4P Purple Shampoo Erika’s hair after one wash with Olaplex No.4P Blonde Enhancer Toning Shampoo Erika Veurink A Closer Look at Olaplex No.4P Blonde Enhancer Toning Shampoo

We are so grateful for your support and cannot wait for you to experience the latest additions to the Olaplex Product family! I also love that you can slot this shampoo into your usual hair care routine. You don’t have to buy a separate conditioner to create a de-brassing "system", you simply follow with your usual No.5 Bond Maintenance Conditioner. Of course, you could use another conditioner if you wish, but I find products from the same brand tend to work in synergy; with Olaplex, this is all the more important, given its unique molecule.

Follow with Nº.5 Bond Maintenance Conditioner for everyday moisture or Nº.8 Bond Intense Moisture Mask for Extra hydration.

To achieve optimum results from this brightening shampoo, you should follow the instructions on the bottle. It’s also important to do a patch test inside your elbow or behind your ear and wait 48 hours to ensure there's no irritation. What is it? The latest and greatest from Olaplex. This weightless, leave-in, silicone-free hair serum shields hair from pollution for 48 hours and provides heat protection up to 450°F. Nº.4P repairs, cleanses, and tones with patented OLAPLEX technology for all blondes, lightened, and grey hair. While hydrating, Nº.4P neutralizes brassiness and brightens the blonde. The highly concentrated pigment allows customizable toning levels ideal for medium to light blonde tones (levels 7 and up) in which yellow or brassy tones need to be controlled. Compared to top purple shampoos, users found their hair 3x brighter using OLAPLEX Nº.4P. The longer you treat, the brighter the toning results, but we recommend starting with one minute and going from there. What hair looks healthier than shiny smooth hair? No.4 has that covered too with Vitamin E, Apricot Kernel Oil, Pomegranate Seed Oil, and Fermented Argan Oil. Rich in Vitamins A & E, Omegas 6 & 9, these ingredients help increase shine, giving the hair a silky texture. The vitamins also add a protective layer to the hair for enhanced manageability and shine.Basically, over styling and hair stressors can break the strong disulphide bonds in the hair. These bonds are necessary for a healthy-looking ‘do. This breakdown then creates a single sulphur hydrogen bond which can pair with three oxygen molecules. If this happens it produces cysteic acid which can eat away at the protein in your hair. This is bad news for our beautiful tresses!