‘Surprising’ results of a survey presented at the annual meeting of the American Academy of Chest Physicians this week in Montreal indicate that there is a widespread misconception that nicotine causes cancer and that this interferes with efforts to stop smoking.

The investigator asserts that switching to “light” cigarettes on the basis of the belief that it will lower nicotine intake and thus reduce cancer risk is specious reasoning, since the carcinogens and other toxins are in the cigarette smoke and not the nicotine. But I don’t get it; it seems to me smokers switching to “light” cigarettes are doing the right thing even if it is for the wrong reason. Despite the mistaken belief that “light” means low-nicotine, doesn’t it indicate low tar and thus less carcinogens? Or is that just a marketing ploy without scientific basis?

In any case, the current study authors point out a more pertinent problem with the mistaken belief that it is the nicotine that causes cancer risk — smokers trying to quit will not use the nicotine patch. And it occurs to me that there is yet another reason why smoking “light” cigarettes would probably backfire. In the psychology of addiction, the belief that you have switched to a more benign product paradoxically encourages increased consumption, often to an extent that more than counteracts the risk reduction of having switched. This happens with food (“It’s ‘lo-cal’, I can have a little bit more…”) and alcohol (“I don’t drink the hard stuff anymore, just beer, so I’m okay…”) as well.