Are all vegetarians and vegans introverts? | The Star
https://www.thestar.com.my/lifestyle/health/2020/07/03/are-all-vegetarians-and-vegans-introverts
Carried out by researchers at the Max Planck Institute for Human Cognitive and Brain Sciences and the University Hospital of Leipzig, both in Germany, the new study looked at 8,943 participants and assessed their personality traits and any symptoms of depression via questionnaires.