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 most ...

Store-bought hair dyes have been a go-to for decades, but they can sometimes come with unwanted side effects. Some users report skin irritation, itching, or even a burning sensation. Now, a new ...

Here’s what the research suggests about the link between hair dye and cancer. Credit...Joyce Lee for The New York Times Supported by By Rachel Rabkin Peachman Q. I color my hair regularly, but I’ve ...