Your gastrointestinal tract houses approximately 70 percent of your immune system and over 100 trillion microorganisms forming the gut microbiome. In a healthy state, beneficial bacteria outnumber harmful pathogens by a ratio of approximately 85:15, producing essential nutrients like B vitamins and vitamin K while maintaining intestinal barrier integrity.
When this microbial balance shifts toward pathogenic dominance through antibiotic exposure, dietary changes, or chronic stress, the resulting dysbiosis triggers a cascade of inflammatory responses. Harmful bacteria produce lipopolysaccharides that activate immune pathways, while beneficial species that normally modulate inflammation decline in number and diversity.
The intestinal barrier consists of a single layer of epithelial cells connected by tight junction proteins. When chronic inflammation, poor nutrition, or prolonged stress compromise these connections, the barrier becomes permeable to partially digested food particles, bacterial endotoxins, and other molecules that should remain contained within the gut lumen. This increased intestinal permeability, often called leaky gut, perpetuates immune activation and systemic inflammation.
