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 ...

Speaker 1: Thank you very much. Speaker 3: (TO AUDIENCE) Right, so I know when I'm mixing hair colour, I need two ingredients, the colour and the developer. And I know you have to get the amounts ...

Changing up the color of your hair is a surefire way to feel like a new version of yourself. However, if you constantly dye your hair lighter with bleach, it may cause dryness, damage, and split ends.

A chemical compound used in many permanent hair dyes has been named Allergen of the Year for 2025 by the American Contact Dermatitis Society (ACDS). Toluene-2,5-diamine sulfate (PTDS) is an ...

Products are independently selected by our editors. We may earn an affiliate commission from links. A trip to the salon can fix nearly any hair snafu, but it never hurts to have home remedies ...