MedicalResearch: What are the main findings of the study?
Answer: Our main focus was to study hairdressers’ exposure to carcinogenic aromatic amines. We found that the concentrations of the carcinogenic compound o-toluidine in blood increased with the number of treatments per week of light color permanent hair dyeing and hair waving treatments. Another aromatic amine, m- toluidine (assessed as not classifiable as carcinogenic to humans owing to a lack of data) in blood, increased with the number of treatments per week of light color hair dyeing and all other hair dyeing.
MedicalResearch: Were any of the findings unexpected?
Answer: We did not expect that the concentrations of o-toluidine to increase with the number of treatments per week of hair waving.
MedicalResearch: What recommendations do you have for future research as a result of this study?
Answer: We will continue measuring aromatic amines in hair dye products and hair waving products for the same aromatic amines that were measured in hairdressers’ blood, to further confirm our results.
Exposure of hairdressers to ortho- and meta- toluidine in hair dye
Gabriella M Johansson, Bo A G Jönsson, Anna Axmon, Christian H Lindh, Marie-Louise Lind, Mats Gustavsson, Karin Broberg, Anders Boman, Birgitta Meding, Carola Lidén, Maria Albin