Immune System Insights

What is the gut–immune–brain axis? Traditionally, we thought of: Brain  → in the skull, does the thinking. Immune system  → fights infections. Gut  → digests food and… that’s it. We now know that’s wildly incomplete. The gut–immune–brain axis  is the bidirectional communication network linking: Gut and its microbes  (the gut microbiome) Immune cells and inflammatory signals  throughout the body Central nervous system  (brain + spinal cord) and enteric nervous system  (the “se