Gut health has become one of the most talked-about topics in nutrition. It has also become one of the most commercially exploited. Here is what the peer-reviewed research actually says — stripped of the marketing.
The Gut Microbiome
The human gut contains approximately 100 trillion microorganisms collectively known as the gut microbiome. A healthy microbiome is characterised by high diversity. IBS, inflammatory bowel disease and a range of other conditions are associated with reduced microbiome diversity.
What Damages the Microbiome
The primary disruptors are well established: antibiotics, ultra-processed foods, chronic stress, inadequate sleep and lack of dietary fibre. Each reduces bacterial diversity. Learn about the best gut health habits to build and maintain diversity.
The Gut-Brain Axis
The gut communicates with the brain via the vagus nerve. Understanding the gut-brain connection is essential for managing IBS effectively — particularly for people who also experience anxiety or low mood.
Diet and the Microbiome
The Low FODMAP diet has far stronger clinical evidence for IBS symptom management than probiotic supplementation alone. Combined with adequate Low FODMAP protein intake, it provides the most comprehensive dietary framework for gut health.