Background: Finding alternative hair dyes for individuals allergic to para-phenylenediamine ... to PTDS who subsequently used a PTDS dye free of PPD tolerated these products.

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 ...

A woman has vowed never to dye her hair at home again after suffering an allergic reaction, leading to two trips to the hospital and 20 days of medication. Isabelle Lowe, 19, was dying her hair at ...