Personality traits related to the gut microbiota
Studies on the gut-brain microbiome axis reveal that the composition and diversity of the gut microbiota are associated with behavioral variation in the general population and allow a new perspective for understanding personality.
As research on the gut-microbiome-brain axis deepens, numerous ways in which our gut microbiome can impact our body's physiology and development—our digestive, immune, and metabolic systems, and even our behavior—are being revealed. The interaction between the gut microbiota and the central nervous system has sparked scientific interest in developing novel treatments for disorders such as autism, depression, Parkinson's disease, and Alzheimer's disease.
Several mechanisms have been identified by which different bacterial groups can affect the brain. The predominant mechanism—whether anti-inflammatory effects, the production of short-chain fatty acids, hormonal effects, or the release of neuroactive metabolites, among others—will depend on the specific bacterial group exerting its action.
A recent study investigated the relationship between the composition and diversity of the gut microbiome and human personality, finding that the abundance of specific bacterial genera was significantly associated with certain personality traits. Analyses of gut microbiome diversity showed that greater diversity was present in people with more social interaction, while altered microbiomes with reduced diversity were associated with people experiencing stress and anxiety.
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References
Katerina V.-A. Johnson, Gut microbiome composition and diversity are related to human personality traits, Human Microbiome Journal , Volume 15, 2020, 100069, ISSN 2452-2317, https://doi.org/10.1016/j.humic.2019.100069