Association Between Using Hair Dyes and Cancer Risk in a Population
Introduction Hair dyes are used by millions of people, so even a small change in cancer risk would be important at the population level. The scientific question is difficult because “hair dye” is not one exposure. Products may be permanent, semi-permanent, or temporary; formulas have changed over time; darker permanent dyes generally use higher concentrations of some intermediates; and occupational exposure among hairdressers differs from occasional personal use. Cancer is

