The company has been making paraphenylenediamine-free claims on a range of products containing the PPD-related chemical ...

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 ...

The Minnesota Department of Health issued a news release Thursday warning against use of henna products that contain additives to create “temporary tattoos.” Materials that are sometimes added to ...

The chemical in hair dye that is most likely to cause an allergy is called para-phenylenediamine (PPD). PPD is found in more than two-thirds of permanent hair dyes and can penetrate the hair shaft ...

The most common allergic reactions to hair dye chemicals are dermatitis of the ... Cross-sensitization means that it not only makes you sensitive to PPD but you become responsive to all of its ...

If a dye doesn't contain PPD, it may well have higher concentrations of lead, mercury and other toxic metals. These have a bleaching action which enhances colour in the hair, but they can cause ...

Yes, chemicals in hair dyes, such as ammonia, peroxide, and para-phenylenediamine (PPD), can enter the body through the scalp. Prolonged exposure or improper use of these dyes may contribute to ...

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 ...