Brain HealthHow Your Gut Microbiome Drives Dementia — and What Diet Can Do About It
A growing body of research shows the gut microbiome is not just a digestive player — it actively shapes brain health. This review examines how imbalances in gut bacteria, known as dysbiosis, trigger neuroinflammation that accelerates Alzheimer's disease, vascular dementia, and other dementias. Key bacterial metabolites — including short-chain fatty acids like butyrate and tryptophan derivatives like indole-3-acetic acid — either protect or damage the blood-brain barrier and regulate immune activity in the brain. The authors highlight how specific dietary patterns rich in fiber, antioxidants, and anti-inflammatory compounds can restore microbial balance and potentially slow cognitive decline. This review offers a practical framework connecting diet, gut health, and dementia prevention for both clinicians and health-conscious adults.
