
Menthol cigarettes, for instance, are so soothing that smokers inhale more deeply and hold the smoke in their lungs longer. Filtered cigarettes, while they do reduce toxins to a small degree, also encourage smokers to inhale more deeply, increasing the risk of a form of lung cancer called adenocarcinoma. And don't forget that "additive-free cigarettes still have addictive nicotine and cancer-causing tar.
Ironically, cigarettes made prior to 1950 were so harsh tasting that smokers inhaled less, which actually reduced their risk.
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