Hair Dyes And Straighteners Linked To Higher Cancer Risk, Especially For Black Women

After eight years of follow-up, White found permanent hair dye use was associated with about a 7% higher risk of developing breast cancer among white women, "whereas in black women that risk was about 45 percent." That risk was even higher among black women who dyed their hair frequently, every one or two months. Researchers don't know which ingredients in the products might be of concern. The stu

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疫学調査