An improvement in lung function and a decline in chronic obstructive pulmonary disease (COPD) risk is associated with frequent consumption of fiber-laden foods.

​This study investigated the effect of following a high-fiber diet on lung function and chronic obstructive pulmonary disease (COPD) risk. A group of researchers from the United States compared the diets, lung function, and COPD odds ratios of 11,897 men and women who participated in the Atherosclerosis Risk in Communities Study. 

The research team found out that individuals who regularly consumed fiber-rich foods, such as whole grains, fruits, and vegetables, had better lung function and lower COPD risk than their peers who ate little or no fiber-containing foods. The findings of this study indicate that generous intake of high-fiber foods may help to improve lung function and ward off COPD.