Showing posts from January, 2012

Occasional marijuana won't harm lungs, finds study

Researchers from University of California, San Francisco have found smoking marijuana occasionally doesn't harm the lungs. However, they also found in their study that excessive cannabis smoking does lead to lung damage.

In their study, published in the Journal of the American Medical Association, the scientists followed 5,016 men and women who were part of the Coronary Artery Risk Development in Young Adults (CARDIA) studyfor a period of 20 years.

Because cannabis has some of the same chemicals as cigarette tobacco, the researchers were interested in finding out if marijuana causes the type of lung damage associated with tobacco.

Fifty-four percent reported they smoked marijuana, tobacco, or both. Tobacco was smoke more often - 8 to 9 cigarettes a day compared with two or 3 episodes of marijuana use in the previous 30 days. 
The authors write:“With up to 7 joint-years of life-time exposure (e.g., 1 joint/day for 7 years or 1 joint/week for 49 years), we found no evidence that increas…