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 ...

Permanent hair colour doesn ... to make sure you don’t have an allergic reaction. As mentioned, a majority of synthetic hair dyes do contain chemicals – and it's super difficult to find ...

Frequent hair colouring can cause significant hair damage, scalp irritation, and hair thinning due to harsh chemicals. It is linked to long-term health issues and environmental concerns.

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 ...

Hair dyes can be an exciting way to refresh your look, but understanding their risks ensures you make informed beauty choices ...

The main concern related to oxidative permanent colouring is the risk of irritation and allergic reactions. Hair dye residues, when improperly disposed of, can contaminate soil and water resources ...

These semi-permanent hair dyes are perfect for switching up your ... types and has been proven to significantly reduce allergic reactions. The non-permanent colour gradually fades after 28 washes ...

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 ...