🦠 Gut Microbiome: An Evidence Hub
The gut microbiome — roughly 1,000 species and 100 trillion microbes living in our GI tract — has emerged as one of the most active frontiers in biomedical research over the past 15 years. This hub curates our systematic-review-based articles on how gut microbes intersect with mental health, immunity, metabolism, and diet.
1. What is the gut microbiome?
The gut microbiome is a living ecosystem of ~1,000 microbial species. Individual composition is highly variable, largely established by age 3, and modulated in adulthood mainly by diet, environment, and antibiotics. Big compositional shifts typically require sustained interventions.
📌 Editorial note: Commercial microbiome tests exist but interpretation and personalized guidance are not yet standardized. This is an active area of research.
2. The gut-brain axis
The gut and brain communicate bidirectionally via the vagus nerve, circulating metabolites, and immune signaling. This gut-brain axis is now linked, at least associatively, to depression, anxiety, and Parkinson's disease in large systematic reviews.
3. Probiotics: what the evidence shows
The intuitive picture — "eat good bacteria, feel better" — masks a more nuanced reality. Effectiveness depends heavily on strain, dose, and timing. Knowing where the evidence actually is strong matters.
🌟 Deep-dive review
Probiotics for Diarrhea: What Science Says About Efficacy and Use
Synthesis of 10 systematic reviews and meta-analyses. Covers antibiotic-associated, infectious, and chronic diarrhea. Discusses Lactobacillus rhamnosus GG and Saccharomyces boulardii efficacy in numbers.
4. Diet and the microbiome
Dietary fiber (especially fermentable fiber) produces short-chain fatty acids that support gut epithelium and reduce systemic inflammation. Intermittent fasting research is also active for microbiome effects.
5. Immunity and inflammation
Roughly 70% of the body's immune cells reside in the gut. Dysbiosis is now implicated in allergies, autoimmune conditions, and low-grade inflammation.
Other related articles (latest):
- Fecal microbiota transplant linked to reduced neurotoxicity via gut-brain axis
- Probiotics for Diarrhea: What Science Says About Efficacy and Use
- Oral Microbiome and Alzheimer's Disease: Immune Pathway Link Emerges in New Research
- Adrenal Insufficiency After Cancer Treatment: 75% of Patients Show Fatigue-Masked Side Effect
- Gut-Brain Axis in Colorectal Cancer: Cancer Cells Signal the Brain to Alter Tumor Growth
- How Your Brain, Gut Bacteria, and Immune System Team Up Against Tumors
- Shrimp Immunity Linked to Gut Bacteria Shifts from Diet Boosters
- Gut Bacteria Shape Transplant Outcomes in Children with Cancer
- Gut Bacteria Products Linked to Autism Brain Changes
- Your Gut Bacteria May Influence Brain Inflammation
- Gut Microbes Shape Life-or-Death Outcomes After Stem Cell Transplants
- How Gut Bacteria May Influence Bone Strength and Fracture Risk
6. Learn more
- 🔬 PubMed Lab — search PubMed directly and chat with AI about papers
- 📝 Editorial policy
- 🏷️ #gut-microbiome tag
- 🏷️ #probiotics tag
Last updated: 2026-09-22