This is the first time Perry has developed product, playing a core part in the testing and refinement process.

Finding a hair dye that delivers rich, natural-looking coverage without leaving your strands dry, damaged, or one-dimensional. With so many formulas on the market—permanent, demi-permanent ...

It merely applies pigment to the outside shaft of the hair, as opposed to permanent and semi-permanent dyes. This makes it ...

Women who regularly use permanent hair dye may be putting themselves at increased risk of bladder cancer, new research findings suggest. The study is the first to show that how often you use hair ...

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 ...

but it never hurts to have home remedies—including the best hair dyes for gray hair—on hand. When gray hairs start creeping up unexpectedly and your colorist is booked solid for weeks ...

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 ...

Wondering how to dye your hair at home? We've spoken to hair colour experts to find out everything you need to know before colouring your own hair.