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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 ...

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 ...

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 ...