Gut microbiota and health

The human gut harbors trillions of microorganisms—bacteria, archaea, fungi, and viruses—whose collective genomes encode a biochemical repertoire far exceeding our own, enabling them to metabolize dietary compounds, synthesize signaling molecules like short-chain fatty acids, and communicate directly with host immune and metabolic systems. Researchers use metagenomic sequencing and functional assays to decode how the composition and activity of these microbial communities shift in conditions such as obesity, type 2 diabetes, and inflammatory bowel disease, asking whether those shifts are causes or consequences of disease. A central challenge is moving from association to mechanism: pinpointing which microbial species, genes, or metabolites drive specific physiological outcomes, and understanding how diet, antibiotics, and host genetics modulate that chemistry. Translating these findings into therapeutic strategies—whether through probiotics, prebiotics, or targeted microbiome editing—remains an open and actively contested frontier.

Works

159,281

Total citations

4,799,290

Keywords

Gut MicrobiotaMicrobial CommunitiesShort-Chain Fatty AcidsMetagenomic AnalysisHost-Microbial InteractionsObesity-associated Microbiome