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Assessing Health Risks: Elevated cotinine levels correlate with increased health risks associated with smoking

Smooth the paper flat

A study in China found that school-age children exposed to secondhand smoke had increased cough and decreased lung function compared with children not exposed to secondhand smoke (He et al., 2011), and a study from Finland found that children of mothers who smoked combustible tobacco cigarettes during pregnancy were more likely to have increased airway resistance than children of mothers who did not smoke (Kalliola et al., 2013)

Duke speculates that tobacco was incorporated into the culture, although there are many uncertainties about the culture that the indigenous people had about 12,300 years ago

"However, diacetyl and other related flavoring chemicals are used in many other flavors beyond butter-flavored popcorn, including fruit flavors, alcohol flavors, and, we learned in our study, candy flavored e-cigarettes."