The gut plays a central role in providing the brain with neurochemicals, such as serotonin. One main pathway between the brain and the gut is the vagus nerve. About 80% of these nerve fibres are signalling from the gut to the brain, and only 20% is the other way around.
Much of the information comes from gut microbes, which is influenced by diet and stress. The large intestine act as a fermentation organ and is heavily populated with microbes. The microbes break down fibres producing substances that are linked to positive health outcomes.
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The link between the brain the gut works in three ways:
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 p...
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