This study screened LPG as a asthma marker by performing metabolomics of the included asthma patients and normal controls, explored the relationship between LPG and clinical features of asthma (including acute exacerbation, asthma control state, asthma treatment steps，lung function, and inflammatory signals including eosinophils, FeNO and total IgE), and further performed in vitro tests to investigate the specific mechanism of LPG's involvement in asthma inflammation through its influence on Treg function.
