Black seed oil has long been used to treat bronchitis, asthma, and other lung and breathing concerns, thanks to its anti-inflammatory effects. Studies show that taking the oil orally—and in combination with other asthma medications—can help control asthma symptoms, improving coughing, wheezing, and lung function. Black seed oil has also been shown to be helpful in improving lung function of those suffering from COPD when used in combination with prescribed inhalers.