AUTHOR=Wang Lei , Wu Junjun , Jiang Ziwen , Wang Chao , Lin Fuxiang , Zhong Yuxiang , Zhao Pengpeng , Wei Wei , Huang Jianhua , Xu Zhanping TITLE=Dietary index for gut microbiota and its protective role against kidney stones: evidence of diabetes as a mediator from NHANES cross-sectional data JOURNAL=Frontiers in Nutrition VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2025.1532313 DOI=10.3389/fnut.2025.1532313 ISSN=2296-861X