Assessment of occupational genotoxic risk among Brazilian hairdressers.

Objectives: To evaluate the genotoxic risk to hairdressers exposed daily to chemical substances such as hair dyes, waving and straightening preparations and manicurists' products by the Comet assay test (single-cell gel electrophoresis).

Methods: The Comet assay was performed on blood samples from 69 female hairdressers (36.4 +/- 10.