Study shows smoking Pot doesn’t impair lung capacity.

Even though most marijuana smokers tend to inhale deeply and hold the smoke in for as long as they can before exhaling, the lung capacity didn’t deteriorate even among those who smoked a joint a day for seven years or once a week for 20 years, according to the study published Tuesday in JAMA, the journal of the American Medical Association.

Original Contribution

Association Between Marijuana Exposure and Pulmonary Function Over 20 Years