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While e-cigarette advertisements claim the devices can help people quit smoking cigarettes, research shows that they also targeted non-smoker teens, and scientists are discovering that e-cigarettes can cause serious harm on their own

Researchers did not observe an increase in mens deaths

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The study is the first to look at how cannabis and tobacco interact when mixed together in joints, which is how the majority of cannabis users in Europe consume the drug

10.1001/archinte.1992.00400140073017 240

MtDNA gene expression and methylation does not change in airway epithelial cells after short-term (24 h) CSE exposure To study whether mitochondrial gene expression changes were induced as an immediate response to high dose CSE (higher than 10%) and whether these were related to mtDNA methylation changes, BEAS-2B cells were exposed for 24 h to 10% CSE