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 ...

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.

Hair dyes contain chemicals that in rare cases can cause severe, even life-threatening, allergic reactions. Hair dye manufacturers say they are not intended for anyone under the age of 16.

Once applied, cover your hair with a shower cap to keep it warm and moist, which helps the dye to set. Leave the henna on for ...

While ancient dyes were made of plant and animal extracts, the evolution of the practice has seen the use of aggressive chemicals that can trigger allergic reactions and cause harm to users. Hair ...

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 ...