A study found that children exposed to secondhand vapor from e-cigarettes absorb 84% less nicotine than those exposed to tobacco smoke from traditional cigarettes. However, nicotine absorption is still five times higher in children exposed to vapor compared to those with no exposure. The study analyzed data from the US Continuous National Health and Nutrition Examination Survey, with 1777 children aged 3-11 years included. Results showed that children exposed to secondhand cigarette smoke had the highest nicotine absorption, while those exposed to vapor had significantly lower absorption. The findings suggest that vaping indoors may reduce children’s exposure to nicotine, but not eliminate it completely. The study was led by Harry Tattan-Birch, PhD, from University College London and was published in JAMA Network Open. Limitations include data collected between 2017 and 2020, potential inaccuracies in reporting secondhand exposure, and a limited sample size for examining associations based on demographics. Various authors disclosed receiving grants from pharmaceutical companies and other organizations.
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