The gut–brain axis
The brain and gut have a strong, two-way communication system Each are essential to the other – studies have found that brain development is abnormal in the absence of the gut microbiome. Gut microbes can produce most of the neurotransmitters found in the human brain, including serotonin, which plays a key role in regulating mood.
However, research hasn’t yet figured out which exact gut bacterium are crucial for brain development.
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