The lungs perform several vital functions, such as oxygenating the blood to maintain the functioning of other organs in the body. But the lungs might be susceptible to disease or infection due to genetic and environmental factors. When at risk of lung diseases like cancer, doctors prescribe treatments and certain lifestyle changes, such as making better food choices to improve lung health and prevent diseases. So, here are the best foods for improving lung health: Beetroot Adding beetroot to meals is one of the best ways to improve lung health. The colored roots and greens of the beet plant contain compounds such as nitrates, which can help relax the blood vessels, improve oxygen uptake, and reduce blood pressure. Further, the nutrients in beetroots may also help improve lung function in those with health conditions like COPD and pulmonary hypertension—a type of high blood pressure. Apples The lungs are susceptible to oxidative stress, which may result in inflammation of the airways. Apples are rich in antioxidants, including vitamin C and the flavonoid quercetin, which could reduce such stress and improve lung function. Eating apples has also been associated with a lower risk of asthma. Five or more apples per week can also help reduce the risk of developing COPD.  Dark chocolate A bar of dark chocolate can improve lung health as it contains cocoa, which is rich in flavonoids that act as antioxidants.