You must have heard the term gut instinct; for the past few years science has spent all of its effort rubbishing it!
Well, gut instinct is real!
The brain is the organ that consumes the most amount of energy in your body. Almost 20% of all energy consumed is by the brain. The gut is responsible for digesting your food and sending the energy towards various organs.
This is apparently why you feel sleepy after a huge meal. All the energy is diverted to the stomach and the gut.
Now when your brain enters stressful situations, it has a veto. It can force the gut to transfer all of the energy towards the brain and gut always obliges.
When the gut feels the ingredients of a stressful situation developing, it tells your brain - "This is not good!!!".
We call this gut instinct.