WebMD reports Pot Smoking Not Linked to Lung Cancer

We’ve been aware of this study for a little while now — but still it’s nice to see it showing up:

Pot Smoking Not Linked to Lung Cancer
Study Shows No Increased Risk for Even the Heaviest Marijuana Smokers
By Salynn Boyles, WebMD Medical News
Reviewed By Louise Chang, MD on Tuesday, May 23, 2006

May 23, 2006 — People who smoke marijuana do not appear to be at increased risk for developing lung cancer, new research suggests.
While a clear increase in cancer risk was seen among cigarette smokers in the study, no such association was seen for regular cannabis users.
Even very heavy, long-term marijuana users who had smoked more than 22,000 joints over a lifetime seemed to have no greater risk than infrequent marijuana users or nonusers. […]
Studies suggest that marijuana smoke contains 50% higher concentrations of chemicals linked to lung cancer than cigarette smoke. Marijuana smokers also tend to inhale deeper than cigarette smokers and hold the inhaled smoke in their lungs longer.
So why isn’t smoking marijuana as dangerous as smoking cigarettes in terms of cancer risk?
The answer isn’t clear, but the experts say it might have something to do with tetrahydrocannabinol, or THC, which is a chemical found in marijuana smoke. […]

[Thanks, Allan]
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