Permanent hair dye and straighteners may increase breast cancer risk by messing with our hormones
Added 12-04-19 12:14:02am EST - “A study of more than 46,000 women across the US suggests that permanent hair dyes and straighteners may mess with our hormones in dangerous ways.” - Businessinsider.com
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Women who use permanent hair dye and chemical straighteners may get more than just shinier, brighter hair, according to a new study.
Public health experts who studied the hair care habits of more than 46,000 women across the US from 2003 to 2009 have found that women who permanently dye their hair tend to also be roughly 9% more likely than other women to develop breast cancer.
In the study, conducted in women who had at least one sister with breast cancer, 55% of women surveyed said they'd used permanent hair dye in the past 12 months.
Corresponding study author Alexandra White told Insider that her study findings should be treated with some caution.
"Relative risk sounds very high, but these are not huge increases in risk," she said. "These point estimates are small in magnitude, and need to be put in context of everything else we know that influences breast cancer risk."
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