IMO it's not bad for you smoked, (clean spice). It actually seems to clear my lungs cause I cough it up after I'm done, and it probably brings some other crap up with it. Plus it's already natural in you're body so it's not like a foriegn material. I'm no doctor though.
I usually partake once a day, but I use it for meditational purposes. Or in a way, it's kinda like saying my prayers and having my sins for the day cleansed, and guidance for tomarrow. I would prefer to do it less, but feel pulled to use it as much as I've been.
I have an overactive imagination, and am certifiably insane. So anything I post is purely fictional.