Harsh ones may signal the need to reduce triggers
The combustion process produces over 7,000 chemicals , including formaldehyde, ammonia, and arsenic many of which are not found in vapes
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But e-cigarettes are not harmless and there is no evidence they aid weight loss, so are not recommended for non-smokers. Prof Peter Hajek, Director of the Tobacco Dependence Research Unit at Queen Mary University of London, comments: Nicotine may have a potential in weight management, but given the serious risks of smoking, this aspect has rightly never attracted much attention
youth and young adults who had never regularly used tobacco, cannabis use was associated with a large increase in current tobacco use four years later