These dyes are also made to open the hair cuticle better, so the color can go deeper and last longer. This makes them ideal for dealing with the unique challenges of coloring gray hair," he says.
Chemicals in hair dyes may cause allergies for some people. Around 38% of people who color their hair report having an allergic reaction to hair dye. The most common allergic reaction to hair dye is ...
A 2020 study of over 117,200 women in the United States found an association between hair dyes and an increased risk of some cancers, including: This study had several limitations that might make the ...