UC San Francisco Experts Say Inhaling Cannabis May Greatly Increase Your Risk of Lung Disease

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October 2, 2025 – By Victoria Colliver – If you’re looking to reduce your chances of developing lung disease, say experts at UC San Francisco, then it may be smart to avoid inhaling cannabis.

A new study in the Journal of General Internal Medicine found that inhaling marijuana every day is associated with a 44% increased chance of developing asthma. It also increases the odds of developing a common set of lung diseases known as chronic obstructive pulmonary disease (COPD) by 27%…

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