Parsley may help improve asthma symptoms by improving breathing and reducing inflammation. Parsley also possesses anti-inflammatory properties, which can be helpful in combating the chronic bronchitis that is often associated with asthma. Additionally, parsley helps to regulate the immune system and protect against respiratory infections. Some studies have shown that parsleys may also beneficially impact lung function and reduce COPD symptoms. All of these benefits make parsley a great choice for people who suffer from asthma or related conditions.