Gut health refers to how well the digestive system functions and the balance of the gut microbiome, the trillions of bacteria living in the intestines. The microbiome helps digest fibre, produces signalling molecules and interacts with immunity, metabolism and appetite regulation.
Evidence links a diverse, fibre fed microbiome with better metabolic health, while ultra processed diets reduce diversity. Practical support is unglamorous but effective: varied plants, fibre, fermented foods and limiting unnecessary antibiotics. Persistent gut symptoms warrant a medical review rather than supplements alone.