It's not good, obviously, but it's better than combustion and I have to believe better than concentrate. But there just isn't any empirical evidence to confirm at this point.

I just had a physical and mentioned I dry herb vape, which he was unfamiliar with. My heart and lungs sound fine and I've been a daily user for years. Grain of salt, of course.

You might be vaping at too high of a temp. Also, try holding the vapor in your mouth for a few seconds to cool it before inhaling it.

Yeah the dry herb vape has also been fine. Though it is easier to get my hands on processed weed than the flowers.