fig3

Figure 3. Specific gravity-corrected urinary biomarker concentrations (ng/mL) based on hair salon products used in a typical week (n = 23, 2018-2019). The figure compares 2-naphthol and MeP concentrations between hairdressers who used (“yes”, denoted by blue dots) select hair products, compared to those who did not use these products (“no”, denoted by green dots). MeP: Methylparaben.