04/04/2026
The gut is responsible for more than digestion. It’s an active signaling hub that shapes how we think, feel, and age.
A major scientific review of nearly 200 studies shows that the gut communicates with the brain through hormones, neural pathways, immune signals, and the microbiome—affecting mood, metabolism, inflammation, and cognitive health. Over 90% of serotonin is produced in the gut, and new therapies like GLP-1 receptor agonists work by influencing gut-brain signaling rather than isolated symptoms.
For longevity, this connection matters. Metabolic resilience, mental clarity, and immune balance—core pillars of healthy aging—are all influenced by the gut.
Source: Lorsch, Zachary S., and Rodger A. Liddle. “Mechanisms and clinical implications of gut-brain interactions.” The Journal of Clinical Investigation 136.1 (2026).