Can quitting undo lung damage

Quitting smoking speeds up the improvement of lung functions and reduces the damage caused by it, but it does not eliminate all biological changes and ongoing injuries left by lung cells, especially those related to tissue damage and immune response. According to recent studies, the body begins to recover within hours to months after quitting, with improvements in lung function and cilia. However, permanent damage to the alveoli remains irreversible, leaving former smokers at a higher risk of diseases such as lung cancer and chronic obstructive pulmonary disease (COPD) compared to non-smokers. Despite this, quitting smoking remains one of the most important steps to improve health and reduce the risk of chronic diseases, as the risks of cancer and heart diseases gradually decrease over time after stopping.

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