Gut-Brain Axis
The two-way communication network between your gut and brain that regulates hunger, fullness, and metabolism.
Plain English
Patient-Friendly Explanation
The gut-brain axis is the two-way communication highway between your digestive system and your brain. Your gut sends signals about hunger, fullness, and the food you eat directly to your brain through nerves and hormones. When this communication works well, your appetite and metabolism stay balanced — but disruptions can drive overeating and weight gain.
Medical
Clinical Definition
The gut-brain axis refers to the bidirectional neurohumoral communication network linking the enteric nervous system, the vagus nerve, and the central nervous system. It integrates gut-derived signals — including nutrient-sensing hormones (GLP-1, PYY, CCK), microbial metabolites, and vagal afferent input — to regulate energy homeostasis, appetite, and metabolic function.
Key Insight
Why It Matters
A disrupted gut-brain axis can blunt satiety signalling and drive excess caloric intake, making weight loss harder. At Accord Medical, Dr Joseph Wang addresses this through treatments that target gut-brain pathways, including GLP-1 receptor agonists that restore normal appetite signalling.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: August 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.