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Nicotine and Cancer: Are You Among Misinformed?

Survey Shows Many Smokers Don't Really Understand How Cigarettes Cause Cancer
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WebMD Health News
Reviewed by Louise Chang, MD

Nov. 1, 2005 -- Women who smoke worry more about the health risks than men, and both sexes know far less than they should about how cigarettes cause cancer, new research suggests.

The biggest misconception: Well over half of surveyed smokers believed that nicotine was the cancer-causing culprit in cigarettes. Nicotine does not cause cancer, but dozens of other chemicals found in tobacco products do, according to researcher Virginia Reichert, NP.

"There are 4,000 chemicals in every cigarette," Reichert tells WebMD. "People smoke because they are addicted to the nicotine, but they are getting 3,999 other chemicals, too. Two hundred of those chemicals are poisonous and 43 are known carcinogens."

Reichert presented results of a survey at Chest 2005, the annual international scientific assembly of the American College of Chest Physicians. The survey included 1,139 smokers enrolled in a smoking-cessation program.

The Myth of 'Light' Cigarettes

The mistaken belief that nicotine causes cancer has led to the popularity of so-called "light" cigarettes, which are just as likely to cause cancer as any other tobacco product, Reichert says.

Light cigarettes have less nicotine but may contain as many other cancer-causing chemicals as higher-nicotine cigarettes.

People who smoke light brands often unconsciously end up inhaling deeper and smoking more to get the nicotine that they are addicted to, researchers say.

"The irony is that these cigarettes are worse for you because you expose more of your lung to smoke by inhaling deeper," Reichert says.

In a 2001 report, the National Cancer Institute found that light cigarettes provided no benefit to smokers' health, concluding that "there is no such thing as a safe cigarette."

American Cancer Society spokesman Thomas Glynn, PhD, tells WebMD that though light cigarettes have had no impact on lung cancer deaths, they have had another impact.

"Light cigarettes have succeeded in changing where lung cancers are found, but they haven't reduced them," says Glynn, director for cancer science and trends for the ACS. "Before light cigarettes, cancers were typically seen in the upper part of the lung. We now also see them in the lower lung because smokers suck harder and deliver smoke deeper into the lung."

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