How the gut and brain are connected

09/16/2013 | ABC News

A growing number of physicians and researchers say gastrointestinal bacteria may play a role in diagnoses such as anxiety, obsessive-compulsive disorder and attention-deficit/hyperactivity disorder. Some studies have focused on high levels of the metabolite HPHPA, a byproduct of the clostridia bacterium that is linked to dopamine regulation. "The gut bacteria talk to the brain in multiple ways through either the immune system or the enteric nervous system," said McMaster University professor Jane Foster.

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