Worried about the chemicals in your hair dye? Good news ahead.
. Can't give up dye completely? Semi-permanent hair dyes, which weren’t associated with the same risk as permanent ones, and natural hair dyes are are a good place to start.“All permanent hair color uses the same ingredients: an alkali, antioxidants, dyes, and hydrogen peroxide,” says Valerie George, cosmetic chemist, hair-care researcher, and co-host of the Beauty Brains podcast.
FYI: Even dark shades require hydrogen peroxide, and this basic formula applies to both DIY dyes and the stuff your stylist whips up in the salon.How Semi-Permanent Hair Dye Works Semi-permanent dye is different. “Permanent dyes penetrate into the hair fiber because of the alkaline pH and swelling of the hair,” George says. “Semi-permanent dyes generally stick to the surface because the base isn’t as alkaline and the hair doesn’t swell as much to allow penetration.”
So, as you can imagine, semi-permanent dyes are formulated differently. “Semi-permanent dyes may have less of the potentially concerning chemicals,” says Alexandra White, Ph.D., a researcher at the National Institute of Environmental Health Sciences and author of the study.Well, “natural” is a bit of a marketing term. “The only natural hair dyes on the market are henna,
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