There is something to that saying “I have a gut feeling”. The small intestine houses around 100 million neurons, which is why the gut now has the title the “second Brain”.
Researchers are also considering it the 'engine' to our body. It houses 70% of your immune system and it is responsible for producing and storing neurotransmitters that regulate our moods. In fact the intestinal walls produce and store 90% of our Serotonin.