Is Dying Hair Harmful. Risk was greatest among those who had used permanent dyes for longer durations 15 or more years. However a case-control study in Italy found no.
Risk was greatest among those who had used permanent dyes for longer durations 15 or more years. However a case-control study in Italy found no.
However a case-control study in Italy found no.
However a case-control study in Italy found no. However a case-control study in Italy found no. Risk was greatest among those who had used permanent dyes for longer durations 15 or more years.