I used this for about a year on and off, it doesn’t have the same chemicals as real hair dye but it does have chemicals in it, if you’re using it long term make sure you’re moisturising your hair. I was about 20-21 when I tried this, I will say I did overuse it because I got excited lol. I was in that experimental hair phase and over time my hair density decreased. So be careful. I used several colours it was nice