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Beware women! Permanent hair dye and straighteners may increase breast cancer risk

By: Team Ifairer | Posted: 04-12-2019
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Beware women! Permanent hair dye and straighteners may increase breast cancer risk
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It's possible that there are some material differences in the hair products marketed to white and black women that influence cancer risk in different ways. Older black women dying hair to cover their greys may be using products that include coal tar, a known cancer causer. Glossy Brazilian keratin straightening treatments may create another exposure issue. They became extremely popular in the early 2000s, but have fallen out of favor after it was discovered that they release formaldehyde, another known cancer-contributor, when heated.

"Just because something's on the shelf doesn't mean it's safe," Tamarra James-Todd, a public health researcher at Harvard who was not involved in this study but who has been studying chemical exposures and health across different ethnic groups for over a decade, told Insider.

She said one issue is how many different products black women sometimes use on their hair to fit Euro-centric beauty ideals. "People are altering their appearance, and layering chemicals on top of chemical on top of chemicals on themselves," James-Todd said. The solution, she said, is policy change in an industry that is barely regulated.

While the risk of developing breast cancer remains low overall among hair dye and straightener users, James-Todd said that in women who are already genetically predisposed to breast cancer, it's possible that using more hair dye could be like a cancer "tipping point."

White, meanwhile, uses non-permanent highlights in her hair (there was no significant link between semi-permanent hair dyes or temporary colors and cancer risk in the study). Her best advice for avoiding breast cancer has nothing to do with hair care. "I don't know if these findings in particular would put me off of hair dye," she said. Instead, she'd prioritize exercise, which is inversely associated with breast cancer, and has lots of other health benefits, too.

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