Is hair die unhealthy for your hair want to see the truth?

Well it is proven that hair dye is unhealth for you hair...if... you use it as a young child or young adult best age to start using hair dye is age 35 most of the time if you use hair dye under the age of 35 your hair will begin to fall out at an early age and turn gray earlier than that even because you hair is young and the color vesles are not fully developed