Gut microbiota and intestinal environment

The gut microbiota and intestinal environment represent a complex, dynamic ecosystem comprising trillions of microorganisms, including bacteria, viruses, fungi, and archaea, that reside in the human gastrointestinal tract (Medical News Today, 2024). Often referred to as a "virtual organ," this system plays a critical role in host physiology by facilitating nutrient metabolism, synthesizing essential vitamins, and modulating the immune system through the production of metabolites like short-chain fatty acids (SCFAs) (IntechOpen, 2025; NIH, 2024). Dysbiosis, or an imbalance in this microbial community, is linked to a wide range of local and systemic conditions, including inflammatory bowel disease, obesity, type 2 diabetes, and neurodegenerative disorders (Houston Methodist, 2025; BMJ, 2021). Therapeutic strategies targeting the gut environment include probiotics, prebiotics, and fecal microbiota transplantation (FMT), which aim to restore microbial diversity and function (ResearchGate, 2025). Additionally, the microbiota significantly influences drug efficacy and toxicity through biotransformation, making it a key factor in personalized medicine and drug development (Patsnap, 2025; Theranostics, 2022).

Other names

Gut microbiomeIntestinal floraMicrofloraGut ecosystemGastrointestinal microbiota

Modulation of microbial composition and diversity; production of beneficial metabolites like SCFAs; competitive inhibition of pathogens; enhancement of the epithelial barrier; and biotransformation of drugs to alter their bioavailability or toxicity (NIH, 2024; BMJ, 2021).