I can't believe I haven't tried DMT properly yet. I love psychs so much, and it is the God of psychs but soo hard to find
Anyway in answer to your question, from what I've read because it's naturally occurring it pretty much can't damage your body, in fact I'm pretty sure it can't, especially since the dose is low.
It may give you a swift and powerful boot in the face if you start abusing it and being a superhero with it but keep it pure and you should be fine.
For the record I've smoked it twice, barely anything happened both times, don't think I smoked it right, but ever since I've been a far better person. I did it for the first and second time with an old friend who I had a falling out with in High School and we've bonded amazingly since and something just changed in us both those days. I cannot explain it, so don't ask me to, but something about me is purer now and I can't speak for my friend but I think he would undoubtedly agree.
Toke away man, just never lose perspective, always do psychs for the right reasons and that is whatever reason YOU feel you need to use them for.