What features of our personality produce more well-being in those who have them? The conclusions of a study published in the journal Psychoneuroendocrinology they are clear: extraversion not only makes us feel better, but improves health.
To reach this conclusion, a team of researchers from the University of Nottingham (United Kingdom) and the University of California, Los Angeles (UCLA) analyzed 121 healthy adults (86 women and 35 men) five typical personality traits (openness, responsibility, kindness, emotional instability and extroversion).
To do this, they used high sensitivity DNA chips, which analyzed the DNA in order to know what personality traits were related to the expression of certain genes that can affect our health by controlling the activity of our immune system.
People with more extroverted traits had a better functioning of the immune system and therefore, were in better health and sick less. In fact, they presented an immune system more effective than people with any other personality trait (including those responsible). According Kavita Vedhara, from the Nottingham University School of Medicine:
Our results indicate that extroversion was significantly associated with an increase in the expression of pro-inflammatory genes and that awareness is related to a reduction in the expression of pro-inflammatory genes. (...) In other words, extroverts seem to have an immune system that can effectively treat an infection. While cautious people are the ones who may be least exposed to infections, because of their conscience, they have immune systems that can respond less effectively.