HUFFINGTON POST
03/28/2008 02:43 am ET Updated May 25, 2011

"No Association At All...Even A Suggestion Of Some Protective Effect" Between Heavy Smoking Of Marijuana And Cancer...

The largest study of its kind has unexpectedly concluded that smoking marijuana, even regularly and heavily, does not lead to lung cancer. The new findings "were against our expectations," said Donald Tashkin of the University of California at Los Angeles, a pulmonologist who has studied marijuana for 30 years.

"We hypothesized that there would be a positive association between marijuana use and lung cancer, and that the association would be more positive with heavier use," he said. "What we found instead was no association at all, and even a suggestion of some protective effect."

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