Cannabis less harmful to the lungs than tobacco, according to a study

A new comparative study published in Current Problems in Diagnostic Radiology confirms that Many previous studies had suggested : smoking cannabis present fewer pulmonary and cardiovascular risks that smoking tobacco.

Using advanced medical imaging techniques, researchers at the Harvard Medical School evaluated the chest CT scans of 285 participants divided into three distinct groups: non-smokers, tobacco smokers and cannabis smokers.

The results show that the tobacco smokers are much more likely to develop a emphysema and to suffer from a coronary artery calcification that people who smoke exclusively cannabis. In fact, while 62% of the tobacco smokers in the study had emphysema, only 4% of the cannabis users showed signs of the disease—a statistically significant difference.

«Collectively, these findings highlight the distinct characteristics of the pulmonary and cardiovascular manifestations associated with smoking and marijuana use,» the study’s authors write in Current Problems in Diagnostic Radiology (current issues in diagnostic radiology). «It appears that, in general, marijuana users do not develop emphysema or pulmonary hyperinflation.»

Quantitative imaging highlights structural protection

The study, led by the researchers Aparna Singh and Ozgu Alcali, aimed to address the lack of data comparing the lung health among different consumer groups. Participants were carefully matched for age and sex, and the study excluded individuals with serious airway diseases to avoid confounding factors.

Quantitative analysis using computed tomography showed that the total lung volume (TLV) ) was higher among the tobacco users than among cannabis users and non-smokers. Furthermore, some centrolobular opacities with a frosted-glass appearance, a marker often associated with inflammation and early lung damage, was found in 15 % of tobacco smokers, but only in 2 % of cannabis users.

In addition, a moderate to severe calcification of the coronary arteries– an early indicator of heart disease – was identified in 43 % of tobacco smokers, compared with only 25 % of cannabis smokers. These findings add to a growing body of evidence showing that if Smoking tobacco is clearly harmful, but the same is not true for cannabis.

The medical community has long debated this issue due to conflicting data. Previous studies have suggested that smoking cannabis may lead to symptoms similar to those of bronchitis, such as coughing and wheezing, but unlike tobacco, cannabis does not appear to cause permanent damage to the respiratory tract nor result in chronic obstructive pulmonary disease (COPD).

Other studies linking cannabis to emphysema failed to properly control for dual use of tobacco, a major source of confusion. As indicated by the recent study conducted by Harvard, the’No smoking among cannabis users was crucial to obtaining accurate results.

Vaporization: A Safer Method of Inhalation

Another important factor for minimize the health risks associated with cannabis is the method of consumption. While smoking remains the most common method, the vaporization technology—which heats cannabis without combustion—has been shown to significantly reduce the user’s exposure to toxic gases.

Clinical trials have confirmed that theInhalation is a method of administration « safe and effective », especially for people who use cannabis for medical purposes. By avoiding combustion, vaporizing cannabis reduces the risk of harmful substances entering the lungs.