Gastrointestinal (GI) health refers to the proper functioning of the entire digestive system. Stretching from the mouth to the anus, this system breaks down food into nutrients, absorbs energy, and maintains a balanced community of 100 trillion microorganisms.
A healthy gut is critical; it houses 70–80% of the body's immune cells and communicates directly with the brain via the gut-brain axis.
Key Components of GI Health
The Gut Microbiome
Trillions of bacteria and fungi in the large intestine that produce vitamins (B and K) and support immunity.
The Gut-Brain Axis
Constant communication via nerves and hormones influencing mood, stress, and cognitive function.
Motility
The rhythmic process of peristalsis that moves food efficiently through the tract.
System Functionality
- Ingestion & Digestion: Mechanical and chemical breakdown using enzymes and stomach acid.
- Absorption: 90% occurs in the small intestine via microscopic villi.
- Water Reabsorption: The large intestine transforms liquid waste into solid stool.
- Immune Defense: The GALT (Gut-associated lymphoid tissue) acts as a primary line of defense.
Common Gastrointestinal Conditions
- IBS: Pain and bloating affecting the large intestine.
- IBD: Chronic inflammation (Crohn’s and Ulcerative Colitis).
- GERD: Chronic acid reflux damaging the esophagus.
- Coeliac Disease: Autoimmune reaction to gluten.