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 ...

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 ...

One of the best things about semi-permanent hair colours is that they provide an easy way to switch your hair colour without going 100% in with permanent dye. Hair colours of this variety are also ...