Gut-Brain Axis

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.

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.

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.