4. Helps Relieve Symptoms of Respiratory Conditions
NAC can relieve symptoms of respiratory conditions by acting as an antioxidant and expectorant, loosening mucus in your air passageways.
As an antioxidant, NAC helps replenish glutathione levels in your lungs and reduces inflammation in your bronchial tubes and lung tissue.
People with chronic obstructive pulmonary disease (COPD) experience long-term oxidative damage and inflammation of lung tissue, which causes airways to constrict — leading to shortness of breath and coughing.
NAC supplements have been used to improve COPD symptoms, exacerbations and lung decline (17Trusted Source, 18Trusted Source, 19).
In a one-year study, 600 mg of NAC twice a day significantly improved lung function and symptoms in those with stable COPD (20Trusted Source).
Those with chronic bronchitis can also benefit from NAC.
Bronchitis occurs when the mucous membranes in your lungs’ bronchial passageways become inflamed, swell and shut off airways to your lungs (21Trusted Source, 22Trusted Source).
By thinning mucus in your bronchial tubes and boosting glutathione levels, NAC may help decrease the severity and frequency of wheezing, coughing and respiratory attacks (23).
In addition to relieving COPD and bronchitis, NAC may improve other lung and respiratory tract conditions like cystic fibrosis, asthma and pulmonary fibrosis, as well as symptoms of nasal and sinus congestion due to allergies or infections (24Trusted Source).
SUMMARY
NAC’s antioxidant and expectorant capacity can improve lung function by decreasing inflammation as well as breaking up mucus.