According to a review out of the Physicians Committee for Responsible Medicine, eating a plant-based diet high in foods like vegetables, fruits, and fiber can reduce the severity of asthma in some individuals, enabling them to take fewer medical treatments for the condition. On the flip side, however, the study found that eating foods that are high in saturated fat, as well as dairy, may make asthma worse and increase one’s odds of developing the condition.
One study found asthma symptoms were less severe and medication use decreased after eating a plant-based diet for only 8 weeks; after a year, another study found, some asthma patients saw increases in their lungs’ vital capacity.
Beyond that, one study found that removing dairy from one’s diet for 8 weeks caused a 22-percent improvement in how fast asthmatic children could exhale. Eating low amounts of fiber, high amounts of saturated fat and high levels of fat overall were found to make asthma worse.