AUTHOR=Gong Li , Xu Jinghan , Zhuang Yiyang , Zeng Liwei , Peng Zhenfei , Liu Yuzhou , Huang Yinluan , Chen Yutian , Huang Fengyi , Piao Chunli TITLE=Association between adult body shape index and serum levels of the anti-aging protein Klotho in adults: a population-based cross-sectional study of the NHANES from 2007 to 2016 JOURNAL=Frontiers in Endocrinology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2025.1424350 DOI=10.3389/fendo.2025.1424350 ISSN=1664-2392