The reason may be tied to differences in male and female sex hormones.
While the findings about women producing less serotonin are controversial, ‘oestrogen and testosterone, the main sex steroid hormones, have long been known to affect behaviour’, according to the British Society for Neuroendocrinology.
A sample of young adults (=710, 445 female) completed self-report measures of fermented food consumption, neuroticism, and social anxiety.
An interaction model, controlling for demographics, general consumption of healthful foods, and exercise frequency, showed that exercise frequency, neuroticism, and fermented food consumption significantly and independently predicted social anxiety.
Except that science now seems to back the idea that women’s brains may be wired for increased anxiety, depression and mood swings.