In the United States, toxicological assessment is an important part of the broader discussion about electronic cigarettes, nicotine, public health, and regulation. Health discussions about vaping require careful comparison rather than simple claims that products are either completely safe or identical to cigarettes. Federal health agencies state that e-cigarettes are not safe, particularly for youth and young adults, and that most contain nicotine. At the same time, research and policy discussions sometimes consider whether adult smokers could experience lower exposure to some harmful chemicals if they completely switch from combustible cigarettes. That question is different from saying that vaping is risk-free. The health evidence continues to develop, especially concerning long-term effects and patterns of dual use. For that reason, national surveillance and regulatory information are useful when discussing the subject without overstating what the evidence proves.
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