As someone who’s been highlighting her hair since seventh grade (fifth, if you count an unfortunate run-in with Sun-In hair lightener), I’m always on the lookout for products that extend the lifespan of my color. After all, once I’ve forked over hundreds of dollars for the privilege of spending hours in a salon chair under unflattering lighting, I want the results to last as long as possible. At the same time, my hair needs to feel healthy and strong, despite the chemical treatments. Seems like an impossible task, but luckily, I’ve found the Keranique Color Boost Shampoo and Conditioner, an affordable set that blends a color-safe formula with hair-strengthening keratin to give my strands the vivacious, glossy look I’m after. Even better? It’s 20 percent off right now on Amazon.

This hair treatment system focuses on two goals: protecting color and strengthening hair follicles for thick, revitalized strands. First, let’s talk about what’s not in this shampoo and conditioner: sulfates. While sulfates aren’t inherently a “bad” ingredient (and in fact, you can thank them for giving your hair that thorough cleanse and satisfying lather), they can strip the outermost layer of your hair, reducing the lifespan of your salon treatments. A sulfate-free shampoo, like this option from Keranique, will feel more moisturizing on your locks while also limiting breakage. 

As for preventing hair thinning, Keranique’s special formula features keratin, a protein that’s found in your hair naturally but is often lost due to aging or chemical treatments like color. Adding keratin back into your hair helps reduce breakage while simultaneously thickening weak strands and fortifying against environmental damage (like UV rays).

I’ve noticed that when I use the Keranique Color Boost set regularly, I’m able to go longer between color appointments — and at just $40 for a shampoo and conditioner, that’s well worth the money I’ll save on less frequent salon trips. I’ve also noticed that my hair has that oh-so-soft, touchable feel after each hair-wash day. Friends have asked if I just came from the salon, noticing that my strands look rich and luscious. Their minds are blown when I say I’m using an affordable brand that has all the bells and whistles of a more expensive option.

Amazon shoppers agree with me, too. “This is more affordable than salon brands, but provides the same level of luxury, moisture, body, etc,” notes one five-star reviewer, while another adds that it leaves her hair “feeling soft and full of body.” As for how it treats thinning hair, one shopper notes that patience is key, but after just a few weeks “I’ve already noticed I’m losing less hair in the shower and when I brush. I also have more volume on top where it is thinning.”

Older shoppers especially love how this shampoo and conditioner fortifies weak, brittle hair. One 64-year-old shopper, whose stylist wanted her to try a $75 shampoo and conditioner, found the Keranique set to be a much more affordable alternative with the same ingredients. “After using it for about two weeks, I am thoroughly satisfied,” she writes. “My hair is extremely soft and much more manageable than before.” A 67-year-old shopper with brittle hair adds “after one use my hair was so shiny and felt so much healthier!”

Right now, this editor-loved shampoo and conditioner set is 20 percent off on Amazon (plus an additional 10 percent off if you Subscribe and Save). At a mere $40 for both a shampoo and conditioner, this deal is sure to go fast — especially considering the 1,000-plus perfect ratings. Shop the Keranique Color Boost Shampoo and Conditioner on Amazon before the deal ends.