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The study, led by Dr Chiara Herzog and published in Cancer Research , analysed the epigenetic effects of tobacco and e-cigarettes on DNA methylation on cells that are directly exposed to tobacco, such as the cells lining the cheek, and those that are not directly exposed, including blood and cervical cells

"One puff of any of the flavored e-liquids that we tested exposes the smoker to unacceptably dangerous levels of these aldehydes, most of which originates from thermal decomposition of the flavoring compounds," said Khylstov

If your body begins to get used to regular caffeine use, it can mess with your sleep-wake patterns, Gater adds

The higher the pack year number, the more likely a smoker is to have health issues

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