Researchers from the University of California (UC), San Diego, and collaborators conducted a cross-sectional analysis of 567 older men quantifying serum vitamin D metabolites using LC-MSMS and defining stool sub-Operational Taxonomic Units from16S ribosomal RNA gene sequencing data, determining that serum 1,25(OH)2D correlated strongly with high microbiome diversity, generally associated with better health outcomes.


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