一、成分與即時危害的差異 傳統香菸的危害已被廣泛證實,其燃燒產生的煙霧含超過 7,000 種化學物質,包括焦油、一氧化碳及 69 種致癌物。以苯並芘為例,長期吸入可能誘發肺癌,而一氧化碳會降低血液攜氧能力,導致心血管負擔加重。相比之下,relx電子煙煙彈雖不含焦油,但其煙液成分包括尼古丁、丙二醇(PG)、植物甘油(VG)及香料。加熱過程中,這些物質可能產生甲醛、乙醛等有害物質,美國心臟協會研究指出,電子煙使用者的血管功能受損程度與傳統香菸相當,甚至部分指標更嚴重。 不過,部分研究顯示電子煙在減少致癌物方面有一定優勢。英國倫敦國王學院 2023 年研究發現,改用電子煙的使用者體內致癌物「煙草特有亞硝胺」(TSNA)含量降低 90% 以上,其中 NAT 水平降幅高達 99%。這表明電子煙在特定成分上確實低於傳統香菸,但長期影響仍需觀察。...
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