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 ...

Since henna cream contains nutrients such as proteins, antioxidants and vitamins, they get absorbed by the skin and scalp, ...

Here's what experts want you to know about ammonia-free hair dye, the gentler alternative to the harsh chemicals sometimes used in dyes. Plus, the best ammonia-free formulas to buy.

The spirit of punk rock and its core values of self-expression are brought to life in Good Dye Young’s brand-new line of hair dye products, Metalheads. The new line debuted this week, along with ...

Natural hair dyes are gaining popularity as a gentler alternative to chemical dyes. They enhance natural color, add shine, and are kinder to sensitive ...

But cosmetics, including hair dyes, are complex mixtures, so this research is very preliminary and the materials are a likely long way from being commercially viable alternatives to PPD at this time.

With the dye now cool, use an old toothbrush or a fine-tooth comb to apply it to the gray areas. Leave it on for 20 minutes, then wash your hair with a mild shampoo. You'll notice how the grays ...