It wasnt. That focus completely shifted in 2006
Any plant material burned at high temperature releases carbon monoxide (CO), fine particulate matter (PM2.5), polycyclic aromatic hydrocarbons (PAHs), and volatile organic compounds (VOCs).1 A comprehensive review published in Foods (2022) confirmed that herbal cigarettes produce tar and carcinogens at levels comparable to conventional tobacco, despite the absence of nicotine.2 The key combustion byproducts present in all herbal smoke include carbon monoxide, which binds hemoglobin and reduces oxygen delivery to tissues
You can roll the dice and forget about a few cartons of cigarettes in your luggage, but if youre unlucky and you get searched you could be delayed, harassed, flagged, and/or charged the duties anyhow
Hypertension 40:511515
To put this in perspective, this dose is typically 300 times less than a whole-body X-ray scan and is comparable to several hours spent on an aeroplane, where we are more exposed to cosmic radiation coming from the outer space
