gut-brain axis

Your gut microbiome influences your brain through the vagus nerve, immune signaling, and microbial chemistry. Here is what the mechanisms, the animal work, and the human trials actually show, and where the evidence stops.

Your gut is home to roughly 38 trillion bacteria, contains more neurons than your spinal cord, and sends more signals to your brain than it receives back. Here is the full mechanism — from the first bite to the last cell.

The gut-brain axis explained: why nervousness, excitement, and love all produce the same fluttery stomach sensation through the vagus nerve and fight-or-flight.

IBS involves visceral hypersensitivity, gut motility changes, and gut-brain signaling. Explore the biology behind IBS — not a diagnosis guide.

What the gut microbiome is, what it does for digestion, immunity and the brain, and which findings are well established versus still early research.

How understanding the microbiome revealed that trillions of bacteria impact health and disease

Your gut and brain exchange signals through nerves, immune cells, and microbial chemicals. Here is what animal and human studies show about mood, anxiety, and cognition, and where the evidence is still thin.