Investigating the gut microbiome-mediated health benefits of pea bioactives on gut barrier function and gut-brain axis

Pea compounds that feed gut bacteria could help patch a leaky gut and calm inflammation that spreads to the brain. The gut’s inner lining normally acts as a barrier, keeping bacteria and toxins inside the intestines. When that barrier weakens—a condition called “leaky gut”—harmful substances escape into the bloodstream, triggering chronic inflammation linked to diseases from bowel disorders to depression. Peas contain two types of bioactive compounds—raffinose-family oligosaccharides and (poly)phenols—that act as prebiotics, feeding beneficial gut microbes. But researchers do not yet know how these compounds work when consumed together inside the whole pea, rather than as isolated supplements. This project will use lab-grown human intestinal organoids, simulated digestion, and humanised mice to track how pea bioactives reshape the gut microbiome, strengthen the gut barrier, and alter immune signals. A final human trial will test whether eating peas measurably improves cognition. If the work succeeds, it could turn a common, sustainable crop into a dietary tool for preventing low-grade inflammation and protecting brain health—without requiring drugs or expensive supplements. The research is fundamental science: it asks how whole-food compounds interact with the gut-brain axis, a question that could eventually reshape nutritional guidelines for inflammatory and neurological conditions.