buildup that’s accumulated on the scalp can create a barrier between your hair and the hair dye. So, once the color is applied, it can lead to inconsistencies in the coverage, and make the hair ...

The complaint alleges the hair dye companies exhibited “wrongful and negligent conduct” in the research, development, testing and packaging of its products, among other instances.

Methods: A retrospective analysis of patch-test results since October 2006 was done and yielded 28 patients allergic to PPD who were also tested with a hair dye series. From January 2004 through ...

“Given the recent North American data as well as the importance of PTDS as an alternative hair dye option for some patients with PPD contact allergy, we advocate that PTDS be considered for ...

The only trick: Choose a dye that’s gentle on the hair, tough on grays, and easy to apply. To help whittle down the selection, consider the formulas celebrity hairstylists actually recommend ...