What does blue shampoo actually do?

Not only does regular use of blue shampoo promise to keep your hair color looking fresh and free from brassiness, it also promises to add shine. “Hair tends to be affected by the elements, which is why a weekly use of the blue/purple and silver shampoo keeps the hair vibrant, brass-free and not dull,” celebrity hair stylist Kieron Lavine told Huffington Post. Sign us up.

Both O’Rourke and Lavine recommend using blue shampoo no more than once a week, hinting that there is such a thing as too much of a good thing as they have been known to strip hair of moisture. Sam Burnett, owner and creative director of Hare & Bone, agrees. Speaking to Huffington Post, Burnett added, “Shampoos definitely help avoid brassiness but this is also so dependent on the individual’s styling routine.” If you spend a lot of time in the sun, shampoo every day, or blow dry your hair frequently, your color is likely to fade faster, causing brassiness to appear.

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