Nicotine, a highly addictive substance found in tobacco, activates the brains reward system, releasing feel-good chemicals like dopamine
The ROS is a single summary of the effect of smoking on the outcome, with higher positive ROSs corresponding to stronger and more consistent evidence and a higher average effect size of smoking and a negative ROS, suggesting that, based on the available evidence, there is no significant effect of smoking on the outcome after accounting for between-study heterogeneity
Outdoor exposure is far less likely to produce detectable THC levels Wash hands and change clothing after exposure to heavy smoke environments THC can adsorb to skin and clothing as particles If you are tested after significant exposure , disclose the circumstances immediately to the MRO reviewing your result even though it will not reverse a confirmed positive, full transparency is always the right approach and you retain the right to a split-specimen retest within 72 hours of notification
Chart caption: The chart above depicts tobacco's global footprint across the entire supply chain, drawing on statistics from 2014
