The microbiome has been associated with a variety of mental health conditions. Researchers have dubbed this connection "the gut-brain axis" (Forsythe, Sudo, Dinan, Taylor, & Bienenstock, 2010). Bacteria in the gut have been found to produce GABA and serotonin, although the exact mechanism by which these gastrointestinally produced neurotransmitters influence brain functioning is unknown at this time. However, disruptions in the microbiome have been associated with autism, as well as with anxiety and depressive disorders.