> but I feel we should be able to state if e-cigarettes are harmful or not from a purely theoritical standpoint, an explanation on how it interacts with the chemistry of the human body and say it is harmful or not.
I agree with the sentiment but the truth is ballistics is several order of magnitude simpler than biology/biochemistry. I find medicine fascinating, but the more I learn about it the more I am astonished at the huge mismatch between perception of the field and what we actually know. And have always more respect for practitioners.
> Paracetamol was first made in 1877.[21] It is the most commonly used medication for pain and fever in both the United States and Europe.
> How it works is not entirely clear.