fig2

Figure 2. Specific gravity-corrected urinary biomarker concentrations (ng/mL) based on PPE used while performing chemical services (n = 22, 2018-2019). The figure compares 2-naphthol and MeP concentrations between hairdressers who wore masks while providing chemical services (“yes”, denoted by blue dots) and those who did not offer these services (“no”, denoted by green dots). Mask use during the provision of Brazilian blowout only includes hairdressers who provide the service (n = 15). PPE: Personal protective equipment; MeP: methylparaben.