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Tobacco company misrepresented danger from cigarettes

A new UCSF analysis of tobacco industry documents shows that Philip Morris USA manipulated data on the effects of additives in cigarettes, including menthol, obscuring actual toxicity levels and increasing the risk of heart, cancer and other diseases for smokers.

Tobacco industry information can't be taken at face value, the researchers conclude. They say their work provides evidence that hundreds of additives, including menthol, should be eliminated from cigarettes on public health grounds.

The article is published in PLoS Medicine

In the new, independent study, the scientists reassessed data from Philip Morris' "Project MIX," which detailed chemical analyses of smoke and animal toxicology studies of 333 cigarette additives. Philip Morris, the nation's largest tobacco company, published its findings in 2002.

By investigating the origins and design of Project MIX, the UCSF researchers conducted their own inquiry into the Philip Morris results. They stressed that many of the toxins in cigarette smoke substantially increased after additives were added to cigarettes.

They also found, after obtaining evidence that additives increased toxicity, that tobacco scientists adjusted the protocol for presenting their results in a way that obscured these increases.

"We discovered these post-hoc changes in analytical protocols after the industry scientists found that the additives increased cigarette toxicity by increasing the number of fine particles in the cigarette smoke that cause heart and other diseases," said senior author Stanton A. Glantz, PhD, UCSF professor of medicine and director of the Center for Tobacco Control Research and Education at UCSF.

"When we conducted our own analysis by studying additives per cigarette fo

Contact: Elizabeth Fernandez
University of California - San Francisco

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