What is stomach growling?
There are lots of good bacteria living in our gut. Their job is to defend against pathogens, boost our immune system, and break down some compounds found in the food we eat. All the food we consume is fermented by enzymes in different parts of the gut. One of the byproducts of that process is gas, and along with the air we swallow as we eat, that excess air is the cause of a growling stomach.