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For people under the age of 25, nicotine has been proven to negatively affect brain development, leading to lasting cognitive and behavioral impairments, and negatively affecting focus, memory and learning. Another substance found in these products is formaldehyde

[DOI] [PMC free article] [PubMed] [Google Scholar] 96.Lim J, Kim YJ, Kim S, Choi J

There is a growing body of research that shows that they are unhealthy products designed to be addictive and facilitate first-time tobacco smoking

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