Different hair types have different levels of naturally occurring keratin. Curly or frizzy hair will have less keratin than naturally straight tresses, as will chemically treated hair (if it’s been dyed or permed). These types will see the biggest benefits of a keratin hair treatment.

My hair has been bleached and dyed in the past so it was getting lighter at the ends so was showing a variety of different colours in my hair (not a good look) I noticed a difference in the colour after about the third wash, the light hair had begun to darken and blend in with the rest of my hair. First application I found it very drying, as I was applying the shampoo it felt like it was stripping it, my hair felt extremely dry but I think this is becausing it was doing its job and let’s face it it was getting through months of hair colour! Frequency of Use: Most blue shampoos are intended to be used two or three times a week, which is the case with Not Your Mother's Triple Threat Brunette Blue Treatment Shampoo, though weekly use is often plenty. Be sure to read the directions carefully to avoid overusing it, as the blue pigments could leave your hair with a purple tint. "Sometimes purple or blue toning shampoos can over-tone and cause the hair to look dingy," adds celebrity hair colorist Guy Tang. It’s vegan friendly which is great and silicone free. It says that it has a ‘sulfate free system’ but I am interested to know if that means that the product itself is sulfate free. The word ‘system’ to me implies that it may not be so they need to word it differently? I’m unsure what this means.

Who Should Use Blue Shampoo?

Here at PRO:VOKE, we’re the experts in blonde hair. But did you know our Touch Of Silver products are also ideal for brunettes? Shelly Aguirreof Chicago'sMaxine Salonis a professional stylist with 12 years of experience teaching at salons and tradeshows.

Overall, our favorite blue shampoo is Matrix Total Results Brass Off Color Depositing Blue Shampoo. We love that it's formulated specifically for lightened brunette hair and that the sulfate-free blend uses blue-violet pigments to provide a brilliant cool-toned finish with no brassiness in sight. Having said that, Not Your Mother's Triple Threat Brunette Blue Treatment Shampoo is an excellent choice for those on a budget but still want to tweak the orange out of their warm brown highlights. While there are many standout blue 'poos on the market, Matrix Brass Off shines above the rest. Formulated specifically for lightened brunette hair, this sulfate-free hair wash deposits blue-violet pigments to minimize brassiness. In other words, it creates a stunning cool-toned finish that brings out the intended effect of your color-treated hair. The vanilla-rose scent doesn't hurt either. As keratin is a protective protein it can help to strengthen your hair and make it look shinier and healthier. Keratin forms a protective barrier around your hair, restoring the cuticle and helping it to retain moisture – reducing dry damage and boosting shine. Blue vs. Purple: There are lots of blue and purple shampoos on the market. And while they achieve roughly the same outcome, blue is generally intended for brunettes, and purple is for blondes. However, some blue washes lean more toward indigo (and sometimes violet) than classic blue. Boasting a blend of "blue-violet pigments," Matrix Total Results Brass Off Color Depositing Blue Shampoo contains a bit of both. In any case, you can pretty much count on a reduction in brassiness and an overall cooler-toned finish. How? Well, over time, lightened sections of brunette hair can turn brassy and the colour fades. This can occur especially in balayage or ombre hair, or if the hair has been dyed multiple times before. The hair can often become dry and damaged and reveal the underlying pigments which are warmer and more yellow/orange in hue. Of course, some people will like this tone, however, if you don’t, purple shampoo on brunette hair can be your saviour to take out any unwanted warm tones in your hair.Theresa Holland has been contributing to Byrdie since 2020, covering wellness, makeup, skincare, and haircare. For this story, she interviewed two stylists for product recommendations and insight into the science of color-depositing hair washes. Having tried a handful of blue/purple shampoos in the past, she's particularly fond of Fanola and Kevin Murphy. You can read more stories by Theresa on MyDomaine and The Spruce. For added shine, heat protection, and deeper nourishment, use our Touch Of Silver Leave-in Conditioner before drying. Simply spray onto wet or towel dried hair. The pro-vitamin B5 formula will help to make your hair smoother and more manageable after just one wash. Apply blue shampoo to wet hair in the shower. Lather it around, focusing on the color-treated sections, and allow it to sit for three to five minutes. Then rinse it out and use a conditioner like you normally would. Some blue shampoos call for using gloves to avoid getting the color on your skin, but most will wash clean from your hands when you rinse your hair.