negative side effects of tobacco The Health Nicotine Use on the Brain and Body Health effects of smoking tobacco

Many studies try to avoid including participants with comorbidities in things like substance use, and even psychiatric conditions like anxiety and depression, in order to avoid confounding results

For example, the classic study on the natural history of COPD by Fletcher et al 8 excluded non-smokers and thus no information was provided for subjects without a history of smoking but with chronic irreversible airflow obstruction

I would have never connected those dots

Future work worth considering is the impact of biological factors pertaining to human saliva and/or oral microbiome on the biotransformation of hookah volatiles

They are commonly found in convenience stores, tobacco shops, and online cigar retailers