what are the harmful substances in cigarettes two toxic found cigarette smoke Chemicals in #cigaretteschemicals #biologyfacts What Chemicals Are In Cigarettes?
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Factual Insight #8: Studies on buccal (oral mucosa) nicotine absorption confirm that upper-lip placement maximizes contact with the highly vascular gum tissue, improving nicotine uptake consistency compared to lower-lip placement

Ellenberger in the History of Psychiatry

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its the vapour particles that can sometimes be mistaken for smoke, particularly by optical (photoelectric) alarms
