Smoking is a bad habit and it will definitely have a bad impact on your hair, so I think it would be better if you quit smoking. Of course, I'm not your doctor and I think it would be better if you would ask him this question, but I believe there is a strong possibility that it might affect your hair. At the end of the day, the only thing that matters is what do you want and how do you feel about it. I have a friend who lost his hair and he started smoking marijuana and he looks great. He also tried kratom once, because he didn't have any marijuana, so he went and bought some from a vendor who was selling kratom near me, and he loved it, but that's another story. Wish you all the best!