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 ...

Frequent hair colouring can cause significant hair damage, scalp irritation, and hair thinning due to harsh chemicals. It is ...

The only way to find out exactly what you are allergic to is to try out a tiny amount of different sorts of dye, with and without bleach, on a small section of your scalp, and see if your skin reacts.

People often regard it as a traditional natural hair dye and conditioner practice ... the side effects before applying henna ...

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 ...