Background: Finding alternative hair dyes for individuals allergic to para-phenylenediamine (PPD) has been difficult. Newer permanent and demipermanent hair dyes that have replaced PPD with para ...
There is conflicting research on whether exposure to the chemicals used in hair dye is associated with an increased risk of cancer, but some recent studies have noted a potential link. The United ...
Smithsonian Institution The Museum’s collection of hair care products includes cleansers and shampoos, hair dyes and bleaches, hair straighteners and hair wavers, and hair styling products, as well as ...
The vast majority of reactions to hair-dye products are caused by PPD. [4–6] In past years, PPD was used in permanent hair dyes but not in semipermanent dyes. More recently, PPD has been used in ...