Popular hair straightening products expose consumers and stylists to toxic chemicals

EHN
By Environmental Health Sciences StaffJun 19, 2026, 3:01 pm90 ptsTrending
A recent review published in Current Environmental Health Reports found that two types of chemical hair straighteners - relaxers and keratin treatments - each contain multiple classes of known toxic chemicals. In short: Across 21 studies and reports, hair straightening treatments were found to contain multiple…

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