Isabelle Lowe had dyed her hair several times in the past and never experienced a reaction, but that all changed when she used an at-home box dye.

Objective: We examined whether individuals allergic to PPD will tolerate PPD-free hair dyes containing PTDS. Methods: A retrospective analysis of patch-test results since October 2006 was done and ...

this is for home dye kits and those used by professionals in hair salons. The hairdressers own federation goes further saying that "allergy testing is a must for every salon". Getty Images Donna ...

[7] It is possible that patients who test negative to PTDS will be allergic to one of these ingredients. We recommend that the hair dye series be expanded to include these potential allergens.