Women who use permanent hair dye and chemical hair straighteners may be at an increased risk of breast cancer — particularly black women.
A new study from the National Institutes of Health finds that women who use permanent hair dye and chemical hair straighteners are at a higher risk of developing breast cancer — and the risk is particularly high for black women.
It’s not entirely clear why breast cancer risk is especially elevated in black women using permanent hair dye. In general, black women have higher rates of the disease than white women before age 40, and are more likely to die from breast cancer at every age, according to the American Cancer Society.
“Many hair products contain endocrine‐disrupting compounds and carcinogens potentially relevant to breast cancer,” the study authors noted. “Products used predominantly by black women may contain more hormonally‐active compounds.” Added the NCI: “Researchers who reviewed data from 14 studies of female breast cancer and hair dye use published between 1977 and 2002 found that dye users had no increase in the risk of breast cancer compared with nonusers.”
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