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 ...

It's normal for kids to want to experiment with their hair color...but how early is too early to let kids dye their hair? We ...

The itching and soreness are a sign that your skin is allergic to something in the ... In the meantime it would be best for you to avoid hair dyes, but if this is going to be really difficult ...

but some people may be sensitive to dyes such as carmine, Red 40, or Yellow 5 and develop an intolerance or allergic reaction to them. An allergic reaction to food dye can be mild or severe.

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 ...