AUTHOR=Lin Tong , Huang Shanshan , Zhou Fen , Shen Xingkai , Mao Haiyan 

TITLE=Association between vitamin D levels and preserved ratio impaired spirometry: an investigation of mediating roles of systemic inflammation and metabolic indicators

JOURNAL=Frontiers in Nutrition

VOLUME=12

YEAR=2025

URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2025.1527333

DOI=10.3389/fnut.2025.1527333

ISSN=2296-861X