Article: Gut bacteria linked to personality

Sociable people have a higher abundance of certain types of gut bacteria and also more diverse bacteria, an Oxford University study has found.

Dr Katerina Johnson of Oxford University’s Department of Experimental Psychology has been researching the science of that ‘gut feeling’ – the relationship between the bacteria living in the gut (the gut microbiome) and behavioural traits. In a large human study she found that both gut microbiome composition and diversity were related to differences in personality, including sociability and neuroticism.

News article:
http://www.ox.ac.uk/news/2020-01-23-gut-bacteria-linked-personality

Scientific article:
https://www.sciencedirect.com/science/article/pii/s2452231719300181

Quite interesting.
The other four people that I know that have UC like me
have similar personalities. Not particulary sociable.
More introverted types.
Don't think much of/believe in themselves.
Sacrifice themselves for others needs...