NORML Working to Reform Marijuana Laws

Study: Long Term Cannabis Exposure “Not Associated With Significant Effects On Lung Function”

Investigators at Emory University in Atlanta assessed marijuana smoke exposure and lung health in a large representative sample of US adults age 18 to 59. They concluded, “[The] ongoing use of marijuana is associated with increased respiratory symptoms of bronchitis without a significant functional abnormality in spirometry, and cumulative marijuana use under 20 joint-years is not associated significant effects on lung function.”