digestion

Stomach growling comes from a gut-wide muscular sweep called the migrating motor complex, not just an empty stomach — here is the mechanism.

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.

Borborygmi explained: why your stomach growls when hungry, after meals, and in quiet rooms — plus when those sounds signal a real problem.

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