is tobacco bad by itself Health effects of smoking Berkeley study shows ozone and

Propylene glycol Propylene glycol (PG) is used as a solvant in numerous products such as food, cosmetics and pharmaceuticals and is considered safe, eventhough PG is associated in several cases with severe toxicity when added as a solvent to IV drugs such as certain benzodiazepines used in the ICU [12]

Diaz J, Pilon C, Le Foll B, Gros C, Triller A, Schwartz JC, et al

Therefore, cigarette smoke may alter the interaction between intestinal mucosa and microbiota through several mechanisms, including the effects mentioned above in autophagy and UPR (19) (Figure 1)

While modern HTP are relatively new, the science behind heating tobacco is not

they issued smokers an ashtray