Whats the best brand of hair dye for keeping your hair healthy??

I know that pretty much all hair dyes will do damage on your hair. But what brand is the best? I usually use Feria

Whats the best brand of hair dye for keeping your hair healthy??

The most gentle hair dye is going to be a vegetable-based dye, because it has very few chemicals. Henna is also great, but you cannot use henna if you have dyed hair already.