do tobacco pipes need filters question : r/PipeTobacco Filtered Tobacco Pipes vs. Unfiltered

Nicotine increases stress-induced serotonin release by stimulating nicotinic acetylcholine receptor in rat striatum

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34 Functional polymorphisms in the genes coding for these enzymes allow for the identification of fast metabolizers, who have more rapid nicotine clearance and show greater cigarette intake and more intensive smoking topography profiles relative to normal or slow metabolizers

Curiously, however, data from the French cohort of never-smokers does not show this pattern in fact, Couraud reports, those data show no relationship between second-hand smoke exposure and any driver mutation